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46 Responses to “Windows 7 How to: Login failed for user ‘IIS APPPOOL\DefaultAppPool’”

• george Says:
  August 5th, 2009 at 21:19

  Thanks man, it was very useful!
• Luis Says:
  August 7th, 2009 at 05:51

  thanks!!!!!! hours looking for a solution and turned out so simple
• Nguyen Hai Duong from Viet Nam Says:
  August 27th, 2009 at 11:26

  Thx alot
• Kautilya Says:
  October 15th, 2009 at 09:53

  Thanx.
• Haneef Abudulai Says:
  October 21st, 2009 at 10:31

  Thanks a mill, bee battling with this for awhile now. That link helped, even thou it ain’t english

  Thanks
• mERGER Says:
  November 5th, 2009 at 15:04

  Thanks!!!! I have been debugging for 2 days now! This solved it!
• System.Data.SqlClient.SqlException: Login failed for user 'IIS APPPOOLDefaultAppPool'. - שלמה גולדברג Says:
  November 9th, 2009 at 23:00

  [...] לעשות את התהליך הבא: (למעשה אחרי חיפוש בגוגל הגעתי לכאן שהפנה אותי לכאן – אבל היות שזה כתוב בשפה מוזרה שאני לא [...]
• Sumit thapar Says:
  November 11th, 2009 at 11:15

  Hey Thanks a lot man really really helpful
• CDTRIX Says:
  November 13th, 2009 at 22:26

  Thanks, A LOT..
• NicMartel Says:
  November 21st, 2009 at 17:00

  Did not work for me.

  Error: Cannot open database “MyDB.mdf” requested by the login. The login failed. Login failed for user ‘IIS APPPOOL\DefaultAppPool’.

  If I change the DefaultPool Identity to LocalSystem
  Error: Cannot open database “MYDB.mdf” requested by the login. The login failed. Login failed for user ‘NT AUTHORITY\SYSTEM’.
• Mallikarjun Says:
  January 7th, 2010 at 11:27

  thank u
  it really wrks
  please change the language so that it can be understood by all the viewers.
• Webliya Says:
  January 17th, 2010 at 17:53

  thank you
  it works.
• zym Says:
  January 24th, 2010 at 16:32

  nice! thanks
• pebuardi Says:
  February 2nd, 2010 at 16:02

  Thanks a lot.. It’s really solve my problem..
• Brian Shacklett Says:
  February 2nd, 2010 at 21:49

  While this may work, it causes a large security vulnerability. IIS worker processes should not have the access that the Local System account grants.
• Manoj Says:
  February 10th, 2010 at 04:34

  when i try to open website in browser using IIS 7 in window 7 i faced the error loke “Login Feaild IIS APPPOOL/MyWebSite” and my database string pass in web reference dll so how can i solved it.
  please help me
• Shoh Says:
  March 19th, 2010 at 00:04

  Worked for me
• NT Says:
  March 23rd, 2010 at 14:11

  GENIUS! Thank you for the info… it saved me hours of wasting time trying to do it on my own.
• blackblist Says:
  April 15th, 2010 at 14:52

  Thanks !
  i have solved my problem !
• samuelanre Says:
  April 23rd, 2010 at 14:35

  thanks so much. spent a whole night figuring what could be wrong.
  THANKS
• Rema Says:
  June 11th, 2010 at 04:20

  Thanks.. this helped alot…
• ThanhPhong Says:
  June 13th, 2010 at 07:48

  Thanks, it’s helpful for me.
• Rajesh Says:
  June 14th, 2010 at 19:55

  Wonderful.

  This information was very helpful. Things are working like charm
• Carla Says:
  July 19th, 2010 at 20:34

  is there a way i can view this in english…sigh
• fahad Says:
  August 24th, 2010 at 10:07

  Thanks dude it was useful!!!
• MikeM Says:
  September 13th, 2010 at 22:33

  If you do it that way, you are not leveraging the new security features of IIS.

  I think the correct way to do this is to add an SQL login for IIS “APPPOOL\DefaultAppPool”.

  The reason MS stopped using NETWORK SERVICE or LOCAL SYSTEM is that there can be security issues between processes sharing the same account.
• James Says:
  October 10th, 2010 at 16:13

  Brilliant.
• Thulani Mathenjwa Says:
  October 11th, 2010 at 17:34

  Very useful thanx a Million $
• sarvin Says:
  October 13th, 2010 at 07:59

  thanks it was useful
• Sheryar Nizar Says:
  October 22nd, 2010 at 22:24

  Its amazing. thanx
• Nikos Says:
  October 23rd, 2010 at 21:36

  Thanks!!!! I’ve been pulling my hair outfor the last 4 hours trying figure out what the heck was going on!!!!
• N Says:
  November 7th, 2010 at 21:25

  Yeeeeeeeeeeeeees Tnx
• tienhoa82 Says:
  November 8th, 2010 at 17:45

  thankssssss
• shessinho Says:
  November 10th, 2010 at 14:57

  great!
• Freddie de Beer Says:
  November 11th, 2010 at 21:07

  Sure works!! Thanks man saved me time and debugging effort!!
• Donald Carl Kanyenda Says:
  November 22nd, 2010 at 09:48

  I had the Same problem but got the solution from this link

  http://forums.asp.net/p/1510479/3597611.aspx

  hope u enjoying your coding

  Donald carl Kanyenda
• Anil Says:
  December 10th, 2010 at 12:35

  Fantastic… Worked for me… Thanks a lot…
• Koen Says:
  February 22nd, 2011 at 23:49

  Super Thanks, after 1 week a solution that works in 10 seconds
• catherine Says:
  April 3rd, 2011 at 18:29

  thank you so muuuuuuuuuuuuuuuuuuuuuuuuch!!!!!!!!!!!!!
• sri Says:
  April 9th, 2011 at 21:10

  boss u r a STAR thanks a lot man i was struggling with this almost a day man u r a star
• farzad Says:
  May 7th, 2011 at 09:49

  Thanks this is very useful
• bin Says:
  June 16th, 2011 at 05:02

  Thank you very much!
• Hamed Says:
  September 3rd, 2011 at 16:10

  God Bless You
• joy Says:
  March 14th, 2012 at 12:10

  Awesome! saved me time.
• vivek Says:
  July 7th, 2012 at 12:17

  thanks alot
• 1 Says:
  December 11th, 2012 at 21:37

  Url not working …

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