Target

The Central Universities Entrance Test (CUET) is a national-level entrance exam for admission to undergraduate, postgraduate, and research program courses that is conducted by the National Testing Agency (NTA). The exam is introduced by the University Grants Commission (UGC) for admission to various central universities and colleges.

CUET - (UG) - 2023 is a highly anticipated exam for thousands of students across India. It is scheduled to be held from 21 May 2023 onwards in Computer Based Test (CBT) mode.

Last Chance to fill up Your CUET (UG) - 2023 Application Form

The registration window for the CUET (UG) - 2023 has been reopened by the National Testing Agency (NTA) on April 9, 2023. To support the student community, the NTA has given another opportunity to candidates who could not register for the CUET (UG) - 2023.

Reason for reopening the registration window:

Giving reason for reopening the registration window, the NTA has stated that a few requests have been received from the candidates who were unable to finish their registration owing to various unavoidable circumstances.

This opportunity is being provided for all those candidates who applied for CUET (UG) - 2023 but could not register earlier, as well as for those candidates who want to apply as a fresh candidate for CUET (UG) – 2023.

The registration window will close on Thursday, April 11, 2023.

Note:

This is a one-time opportunity for the candidates, so they are advised to use this opportunity very carefully as no further chance will be given to any candidate for applying for CUET (UG) – 2023.

Important Events and Dates

Events	Dates
Reopening of online application forms	April 9, 2023
Last date for submitting online application forms	April 11, 2023 (Up to 11:59 PM)
Examination dates	May 21, 2023 onwards
Result declaration	To be notified later

Steps to Apply

Visit the official website of the CUET exam “cuet.samarth.ac.in”.
Or click on the Direct Link for registration form
Register by providing all the relevant details and login to the portal with the credentials provided on the registered email id and phone number.
Fill out the application form; Upload all the scanned and required documents.
Pay the application fee.
Submit the form, download it as a PDF and take a printout as well for future reference.

The extension of the deadline will allow Students

More time to apply for the exam
Choose their dream course and institution from a wider range of universities and courses asnew Universities / Institutions / Autonomous Colleges / Organizations have joined CUET (UG) – 2023

Important Information For Students

Candidates who have successfully submitted their application forms are also allowed to select additional Subjects (Tests), Courses (Programs), Universities (or other Organizations), Institutions (or other Universities), or Autonomous Colleges (or other Organizations).
Candidates who have already chosen subjects or tests have the option of changing or eliminating those choices. However, the candidate will be responsible for covering any additional costs (if any) associated with choosing more subjects (tests). Applicants should be aware that once a fee is paid, it cannot be reimbursed.
It is not permitted for candidates to submit more than one application form. Even if discovered at a later time, any applicant who has more than one Application Number will be considered to have used UFM (Unfair Means) and will face harsh punishment.
If any candidates encounter problems submitting the application, they can also go to the local Help Center. (if required).
CUET UG 2023 Public Notice for Registration Deadline Extension.pdf

The list of participating Universities / / Institutions / Autonomous Colleges / Organizations

S. No.	Name of Organization
1	Aligarh Muslim University, Uttar Pradesh
2	Assam University
3	Babasaheb Bhimrao Ambedkar University, Lucknow
4	Banaras Hindu University, Uttar Pradesh
5	Central University of Andhra Pradesh
6	Central Tribal University of Andhra Pradesh
7	Central University of Gujarat
8	Central University of Haryana
9	Central University of Himachal Pradesh
10	Central University of Jammu
11	Central University of Jharkhand
12	Central University of Karnataka
13	Central University of Kashmir
14	Central University of Kerala
15	Central University of Odisha
16	Central University of Rajasthan
17	Central University of South Bihar
18	Central University of Tamil Nadu
19	Central Sanskrit University, New Delhi
20	Dr. Harisingh Gaur Vishwa Vidyalaya, Sagar, Madhya Pradesh
21	Guru Ghasidas Vishwavidyalaya, Bilaspur, Chhattisgarh
22	Hemvati Nandan Bahuguna Garhwal University, Srinagar in the Pauri Garhwal district of Uttarakhand
23	Indira Gandhi National Tribal University, Amarkantak, Madhya Pradesh
24	Jamia Millia Islamia, New Delhi
25	Jawaharlal Nehru University , New Delhi
26	Mahatma Gandhi Central University, Motihari (Bihar)
27	Mahatma Gandhi Antarrashtriya Hindi Vishwavidyalaya, Wardha, Maharashtra
28	Manipur University, Imphal, Manipur
29	Maulana Azad National Urdu University, Hyderabad, Telangana
30	Mizoram University , Aizawl, Mizoram
31	Nagaland University , Nagaland
32	National Sanskrit University, Tirupati, Andhra Pradesh
33	North Eastern Hill University, Shillong, Meghalaya
34	Pondicherry University, Kalapet, Pondicherry in Union Territory of Puducherry
35	Rajiv Gandhi University, Arunachal Pradesh
36	Shri Lal Bahadur Shastri National Sanskrit University, New Delhi
37	Sikkim University , Gangtok (Sikkim)
38	Tezpur University , Tezpur, Assam
39	The English and Foreign Languages University, Hyderabad, Telangana
40	Tripura University (Tripura)
41	University of Allahabad, Uttar Pradesh
42	University of Delhi, New Delhi
43	University of Hyderabad, Hyderabad, Telangana
44	Visva Bharati University, Shantiniketan, West Bengal
45	Dr. BR Ambedkar School of Economics University, Bengaluru
46	Tata Institute of Social Sciences (TISS) (Mumbai)
47	Dr. B.R.Ambedkar University, Delhi
48	Madan Mohan Malviya Institute of Technology (Gorakhpur, UP)
49	Jagannath Univesity, Jaipur (Rajasthan)
50	Dr. A.P.J. Abdul Kalam Technical University (AKTU) (UP)
51	BML Munjal University (Haryana)
52	IIMT University, Meerut (UP)
53	Avinashilingam Institute for Home Science and Higher Education for Women, Coimbatore (Tamil Nadu)
54	Mahatma Jyotiba Phule Rohilkhand University, Bareilly (Uttar Pradesh)
55	Teerthanker Mahaveer University, Moradabad (Uttar Pradesh)
56	Jaypee University of Information Technology, Himachal Pradesh
57	Galgotia University, Greater Noida (Uttar Pradesh)
58	Jagan Nath Univesity, Bahadurgarh (Haryana)
59	Mewar University, Rajasthan
60	Shobhit University Meerut (Uttar Pradesh)
61	Gujarat Vidyapith, Ahmedabad (Gujarat)
62	The Gandhigram Rural Institute (DTBU), Tamil Nadu
63	Devi Ahilya VishwaVidyalaya, Indore (Madhya Pradesh)
64	SRM University, Andhra Pradesh
65	Gurukula Kangri, Haridwar (Uttar Pradesh)
66	Sardar Patel, University of Police, Jodhpur (Rajasthan)
67	The Lakshmibai National University of Physical Education, Gwalior (Madhya Pradesh)
68	Dayalbagh Educational Institute, Agra (Uttar Pradesh)
69	IES University, Bhopal (Madhya Pradesh)
70	Shri Mata Vaishno Devi University, Katra (J&K)
71	Apex University, Jaipur (Rajasthan)
72	RNB Global, Bikaner (Rajasthan)
73	Career Point University, Kota (Rajasthan)
74	Barkatullah University, Bhopal (Madhya Pradesh)
75	NIIT University (New Delhi)
76	Chinmaya Vishwa Vidyapeeth , Ernakulam (Kerala)
77	Vikram University, Ujjain (Madhya Pradesh)
78	KR Manglam University, Gurugram (Haryana)
79	Jharkhand Raksha Shakti University, Ranchi (Jharkhand)
80	Chhatrapati Shivaji Maharaj University, Navi Mumbai (Maharashtra)
81	Arunachal University of Studies, Namsai (Arunachal Pradesh)
82	Manav Rachna University, Faridabad (Haryana)
83	Manav Rachna International Institute of Research and Studies, Faridabad (Haryana)
84	NICMAR, Pune (Maharashtra)
85	Nirwan University, Jaipur (Rajasthan)
86	Jamia Hamdard, New Delhi
87	G.D. Goenka , Gurugram (Haryana)
88	Geeta University, Panipat (Haryana)
89	Himalayan University, Itanagar (Arunachal Pradesh)
90	Shoolini University, Solan (Himachal Pradesh)
91	Mangalayatan University, Aligarh (Uttar Pradesh)
92	Sikkim Professional University, Gangtok (Sikkim)
93	Lovely Professional University, Jalandhar (Punjab)
94	Suresh Gyan Vihar University, Jaipur (Rajasthan)
95	Footwear Design and Development Institute (Various locations)
96	Mody University of Science and Technology, Sikar (Rajasthan)
97	Invertis University, Bareilly (Uttar Pradesh)
98	ASBM University, Bhubaneswar (Odisha)
99	Vivekananda Global University, Jaipur (Rajasthan)
100	Guru Gobind Singh Indraprastha University, New Delhi
101	Cluster University of Jammu (Jammu)
102	Delhi Skill and Entrepreneurship University (DSES), New Delhi
103	GLA University, Mathura (Uttar Pradesh)
104	Indira Gandhi Delhi Technical University for Women (IGDTUW), New Delhi
105	Cluster University, Srinagar (Kashmir)
106	Bahra University, Shimla Hills, Solan (Himachal Pradesh)
107	Government College for Women Parade Ground (Jammu)
108	University of Jammu, Jammu
109	Ramakrishna Mission Vivekananda Educational and Research Institute (RKMVERI) Belur, (West Bengal)
110	Mangalayatan University, Jabalpur (Madhya Pradesh)
111	Apeejay Stya University, Gurugram (Haryana)
112	Sangam University, Bhilwara (Rajasthan)
113	Sanskriti University, Mathura (Uttar Pradesh)
114	Sharda University, Greater Noida (Uttar Pradesh)
115	The University of Petroleum and Energy Studies (UPES), Gurugram (Haryana)
116	Usha Martin University, Ranchi (Jharkhand)
117	IILM University, Gurugram (Haryana)
118	Noida International University, Noida (Uttar Pradesh)
119	IILM University, Greater Noida (Uttar Pradesh)
120	Harcourt Butler Technical University, Kanpur (Uttar Pradesh)
121	Islamia College of Science and Commerce, Srinagar (Kashmir)
122	ITM University Gwalior (Madhya Pradesh)
123	Chanakya University, Bengaluru (Karnataka)
124	The ICFAI University, Jaipur (Rajasthan)
125	United University, Prayagraj
126	Datta Meghe Institute of Higher Education and Research (formerly known as Datta Meghe Institute of Medical Sciences), Wardha (Maharashtra)
127	University of Engineering and Technology, Roorkee (Uttar Pradesh)
128	Cotton University, Guwahati, Assam
129	Shri Ramswaroop Memorial University (SRMU), Barabanki (Uttar Pradesh)
130	ICFAI University, Sikkim
131	Uttaranchal University, Dehradun, Uttarakhand
132	Koneru Lakshmaiah Education Foundation, Green Fields, Vaddeswaram, Guntur District, Andhra Pradesh
133	Swami Vivekananda Yoga Anusandhana Samsthana (S-VYASA), Karnataka (Bangalore)
134	Chitkara University, Punjab
135	Somaiya Vidyavihar University, Mumbai (Maharashtra)
136	Jaypee Institute of Information Technology, Noida (Uttar Pradesh)
137	Yenepoya (Deemed to be University), Mangalore (Karnataka)
138	Karnavati University, Gandhinagar (Gujarat)
139	Binod Bihari Mahto Koyalanchal University, Dhanbad (Jharkhand)
140	Chitkara University, Himachal Pradesh
141	Sushant University, Haryana
142	Indian Council of Agricultural Research, New Delhi
143	MVN University, Palwal (Haryana)
144	Khwaja Moinuddin Chishti Language University Lucknow (Uttar Pradesh)
145	Hindustan Institute of Technology and Science, New Delhi
146	Shri Khushal Das University, Rajasthan
147	Joy University, Tirunelveli, Tamil Nadu
148	Jamshedpur Women's University, Jharkhand
149	Vinayaka Mission Research Foundation, Salem (Tamil Nadu)
150	University of Kashmir, Kashmir
151	Hi-Tech Institute of Engineering & Technology, Ghaziabad (Uttar Pradesh)
152	Vinoba Bhave University, Hazaribag, Jharkhand
153	Lohit's Academy College of Commerce, Bengaluru (Karnataka)
154	(GITAM) Gandhi Institute of Technology And Management [3 campuses - Visakhapatnam, Andhra Pradesh (Main Campus), Off Campus, Bengaluru, Karnataka, Off Campus, Hyderabad, Telangana]
155	(GITAM) Gandhi Institute of Technology And Management [3 campuses - Visakhapatnam, Andhra Pradesh (Main Campus), Off Campus, Bengaluru, Karnataka, Off Campus, Hyderabad, Telangana]
156	(GITAM) Gandhi Institute of Technology And Management [3 campuses - Visakhapatnam, Andhra Pradesh (Main Campus), Off Campus, Bengaluru, Karnataka, Off Campus, Hyderabad, Telangana]
157	Indian Institute of Tourism and Travel Management (IITTM) (Bhubaneswar, Noida, Nellore, and Goa)
158	Kolhan University, Chaibasa (Jharkhand)
159	Lingaya's Vidyapeeth, Faridabad (Haryana/ Delhi NCR)
160	Government Degree College, Baramulla (Kashmir)
161	IMS Unison University, Dehradun (Uttarakhand)
162	Amity University Campus: Gurugram (Haryana)
163	Amity University Campus: Gwalior (Madhya Pradesh)
164	Amity University Campus: Jaipur (Rajasthan)
165	Amity University Campus: Lucknow (Uttar Pradesh)
166	Amity University Campus: Mumbai (Maharashtra)
167	Amity University Campus: Raipur (Chhattisgarh)
168	Nilamber-Pitamber University, Medininagar (Jharkhand)
169	Jharkhand Rai University, Ranchi (Jharkhand)
170	Islamic University of Science and Technology, Kashmir
171	K. K. Modi University, Durg (Chattisgarh)
172	Ram Krishna Dharmarth Foundation University, Ranchi (Jharkhand)
173	Presidency University, Bangalore (Karnataka)
174	DAV University, Jalandhar (Punjab)
175	Ranchi University, Jharkhand
176	Baba Ghulam Shah Badshah University, Rajouri, Jammu & Kashmir
177	Graphic Era University, Dehradun (Uttarakhand)
178	The World University of Design, Sonipat (Haryana)
179	Nowgong College (Autonomous), Assam
180	Amity University, 7th Campus: Ranchi (Jharkhand)
181	Dr. Shyama Prasad Mukherjee University (DSPMU), Ranchi (Jharkhand)
182	Graphic Era HILL University (3 campuses: Dehradun, Bhimtal, and Haldwani) UTTARAKHAND
183	Graphic Era HILL University (3 campuses: Dehradun, Bhimtal, and Haldwani) UTTARAKHAND
184	Graphic Era HILL University (3 campuses: Dehradun, Bhimtal, and Haldwani) UTTARAKHAND
185	Sido Kanhu Murmu University (S.K.M.U), Dumka, Jharkhand
186	YBN University, Ranchi (Jharkhand)
187	AKS University, Madhya Pradesh
188	Bhattadev University , Barpeta (Assam)
189	Amity University, 8th campus: Noida (Uttar Pradesh)
190	Nehru Gram Bharati University (NGBU)
191	Amity University, 9th campus: Punjab
192	Amity University, 10th campus: Patna (Bihar)
193	Amity University, 11th campuses: Kolkata (West Bengal)
194	Capital University, Koderma (Jharkhand)
195	Indian Culinary Institute, Noida (Uttar Pradesh)
196	Netaji Subhas University, Jharkhand
197	Sarla Birla University, Ranchi
198	Swami Vivekanand Subharti University, Meerut (Uttar Pradesh)
199	Sai Nath University, Ranchi, Jharkhand
200	ARKA JAIN University, Jharkhand
201	Shyam University, Rajasthan
202	Bhagwant University, Ajmer (Rajasthan)
203	Kalasalingam Academy of Research and Education, Tamil Nadu
204	Alliance University, Bengaluru (Karnataka)
205	AISECT University, Hazaribagh, Jharkhand
206	SHRI VENKATESHWARA UNIVERSITY, Uttar Pradesh
207	SVKM's NARSEE MONJEE COLLEGE OF COMMERCE AND ECONOMICS (AUTONOMOUS), Mumbai (Maharashtra)
208	Manipal University, Jaipur (Rajasthan)
209	Noorul Islam Centre for Higher Education, Kanyakumari (Tamil Nadu)
210	SRM University Delhi-NCR, Sonepat (Haryana)
211	Srinath University, Jamshedpur (Jharkhand)
212	Radha Govind University, Ramgarh (Jharkhand)
213	SVKM's MITHIBAI COLLEGE OF ARTS, CHAUHAN INSTITUTE OF SCIENCE & AMRUTBEN JIVANLAL COLLEGE OF COMMERCE AND ECONOMICS (AUTONOMOUS), Mumbai (Maharashtra)
214	Mansarovar Global University, Bilkisganj, Sehore (Madhya Pradesh)
215	Bharatiya Engineering Science and Technology Innovation University (BEST) Gownivaripaill, Gorantla (Andhra Pradesh)
216	Surajmal University, Kichha, Udhamsingh Nagar, Uttarakhand
217	SRM Institute of Science and Technology, NCR Campus (Delhi-NCR Campus, Delhi- Meerut Road, Modinagar) Ghaziabad (Uttar Pradesh)
218	Tribhuvan College of Environment & Development Sciences, (Nalanda University Center), Neemrana (Rajasthan)
219	Delhi Technological University, New Delhi
220	OPJS University, Churu (Rajasthan)
221	Ramchandra Chandravansi University, Bishrampur, Palamu (Jharkhand)
222	The ICFAI University, Ranchi (Jharkhand)
223	School of Management Sciences (SMS), Varanasi (Uttar Pradesh)
224	Parul University, Vadodara (Gujarat)
225	Netaji Subhas University Of Technology, Dwarka (New Delhi)
226	University of Science and Technology, Meghalaya (USTM)
227	RKDF (Ram Krishna Dharmarth Foundation University) University, Bhopal (MP)
228	Quantum University, Roorkee (Uttarakhand)
229	Maharishi Markandeshwar (Deemed to be University), Mullana - Ambala (Haryana)
230	Tilak Maharashtra Vidyapeeth, Pune (Maharashtra)
231	Rama University, Kanpur (UP)
232	Guru Kashi University, Punjab
233	SGT University (Shree Guru Gobind Singh Tricentenary University), Gurugram - Badli Road, Gurugram

The desirous candidates can also avail of the facility from their nearest Help Centre.
In case any candidate faces difficulty in applying for CUET (UG) – 2023, he/she may contact 011- 40759000 / 011 – 69227700 or e-mail at cuet-ug@nta.ac.in.
The candidates are also advised to be in touch with the NTA website(s) www.nta.ac.in and https://cuet.samarth.ac.in/ for the latest updates regarding the examination.

Check this table to know which is your nearest Help Centre.

S. No.	Center Name	Center Address	City / State 1
1	India International School	Kshipra Path, Opp. V.T. Road, Mansarovar, Jaipur-302020	Jaipur-302020 Jaipur, Rajasthan
2	Modern English School	Kahilipara	Kamrup Metropolitan, Assam
3	DAV International School	By-Pass Road, Verka Chowk, Amritsar Verka Chowk, Amritsar Ma Resort And Verka Milk Plant	Amritsar, Punjab
4	Lawrence And Mayo Public School	Sector A, Srinathpuram Near New Fire Station, Kota	Kota, Rajasthan
5	Cambridge International School For Girls	Cambridge Innovative School Urban Estate Phase-li Jalandhar Punjab	Jalandhar, Punjab
6	Rajhans Vidyalaya	Rajhans Vidyalaya, Munshi Nagar, Near Bhavans College, D N Road, Andheri (West), Mumbai- 400058	Mumbai, Maharashtra
7	Pragati Academy Perumbavoor	Pragati Academy, Perumbavoor, Ernakulam, Kerala	Ernakulam, Kerala
8	Saraswathi Vidyalaya	Arappura, Vattiyoorkavu, Trivandrum Saraswathi Vidyalaya, Arappura, Vattiyoorkavu, Trivandrum 695013 Arappura, Ganapathy Temple	Trivandrum, Kerala
9	Delhi Public School Risali	Delhi Public School Bhilai Risali Sector Bhilai Distt- Durg Chhattisgarh	Durg, Chhattisgarh
10	The Mother's Institute Of Integral Education	Unit-I Near Indoor Hall Behind State Bank Main Branch	Khurda, Odisha
11	Bharatiya Vidya Bhavans Rajaji Vidyashram	No.6, Kilpauk Garden Road, Kilpauk	Chennai, Tamilnadu
12	JSS Public School	No. 31, 15th Main, 22nd Cross. Bengaluru	Bengaluru, Karnataka
13	Sri Padmavati Mahila Visvavidyalayam (Women's University)	Sri Padmavati Mahila Visvavidyalayam, Padmavathi Nagar, M.R.Palli, Tirupati, Chittoor District, Andhra Pradesh	Chittoor District, Andhra Pradesh
14	Senior Secondary Adarsh Vidhya Mandir Janta Colony	Senior Secondary Adarsh Vidhya Mandir Behind Pink Square Mall Janta Colony Govind Marg Jaipur	Jaipur, Rajasthan
15	Lucknow Memorial Public School	Gopalpuri V I P Road Alambagh Lucknow Near Pakri Ka Pul, 226005	Lucknow, Uttar Pradesh
16	HS DAV Public School	Narkatiaganj H S Dav Public School Near Pakri Dhala, Narkatiaganj West Champaran, 845455 Bihar	West Champaran Bihar
17	HRIT Group Of Institutions	7 Km Stone, Delhi-Meerut Road, Morta, Ghaziabad	Ghaziabad, Uttar Pradesh
18	Global Academy For Learning School	Global Academy For Learning School No 40, Chowdeshwari Farm Near Global (V), Pattanagere Main Rd Rajarajeswari Nagar Bangalore Karnataka	Bangalore, Karnataka
19	MLR Institute Of Technology	Laxman Reddy Avenue, Dundigal Police Station Road, Dundigal Dundigal Laxman Reddy Avenue	Medchal Malkajgiri, Telangana
20	SDR (EM) High School Kurnool Andhra Pradesh	SDR EM High School Udumalapuram (V), Nandyal (M), Nandyal Dist. Andhra Pradesh	Kurnool Andhra Pradesh
21	Delhi World Public School	Nityanandapur, P.O. Chandipur (Kajigram), Malda	Malda, West Bengal
22	GAV Public School	Near Municipal Committee Ground, Opposite Vishal Mega Mart, Kangra	Kangra, Himachal Pradesh
23	Samvida Vidya Peeth	Sithapuram Colony Poranki, Land mark Priya Pickles Penamalur Mandal	Vijayawada Krishna District, Andhra Pradesh
24	Lamdon Model Senior Secondary School	Takski-Thank, Sankar Road Ladakh UT, Leh 194101	Leh, Ladakh
25	R P High School	Alamdar Colony, Lal Bazar Srinagar	Srinagar / Ganderbal, Jammu & Kashmir
26	Spring Buds Higher Secondary School	Narkara Road Ompura Budgam	Srinagar / Budgam, Jammu & Kashmir
27	Shemford Futuristic School	Wanpoh Anantnag	Anantnag, Jammu & Kashmir
28	Sanctorum Public School	Sanctorum Public School Lalad Sopore	Baramulla/ Kupwara / Bandipora, Jammu & Kashmir
29	Lyceum International School	Pulwama	Pulwama/Shopian, Jammu & Kashmir
30	Delhi Public School Bopal	Bopal Square Near Bopal Railway Crossing, Ahmedabad 380058	Ahmedabad, Gujarat
31	BR Memorial Central School	Chethady, Chengamanadu, Kottarakkara, Kollam [Dist], Kerala	Kollam, K
32	St. Francis Hr. Sec. School	Ameri Road, Ring Road-2, Near Rani Sati Temple, Bilaspur,	Bilas Chhatti
33	Bhavan's Tripura Vidya Mandir	Bhavans Tripura Vidya Mandir, P.O. - Bimangar, Narsinghar, Tripura (W)	Narsinghar,
34	Government Polytechnic Ambikapur	Near At Gandhi Chowk, Namnakala	Ambikapur, Cattisgarh

It is important to regularly visit the NTA website www.nta.ac.in and https://cuet.samarth.ac.in/ to get any updates on the CUET UG 2023 exam date.

As the saying goes, practice makes a man perfect.

Boost Your CUET (UG) – 2023 score by solving practice papers and previous years’ papers.

Download PREVIOUS Year PAPERS OF CUET

Go for CUET Practice Papers

CUET (UG) - 2023: Reopening of Registration Window