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Description
A Hotfix is a product update package with one or more updated product files that fix a specific product problem.

IMPORTANT NOTE

Please be aware this Hotfix has not gone through full Microsoft product regression testing nor has it been tested in combination with other Hotfixes.

Please carefully review the associated Hotfix KB article to verify the fix is the one needed and there are no known compatibility or installation issues. You may also want to contact a Microsoft Support Professional at http://support.microsoft.com

Issue Description

QFE for Sharepoint issues - Perf Counter fix and User Impersonation issue

Additional Information about the issue resolved by this Hotfix can be found in its Knowledge Base article at http://support.microsoft.com/kb/979917

Additional Hotfixes
Search the list of all other publicly available Visual Studio and .NET Framework Hotfixes at http://archive.msdn.microsoft.com/Project/ProjectDirectory.aspx?TagName=Hotfix&ProjectSearchText=Hotfix*
Last edited Mar 12 2010 at 8:41 PM  by DDHotfix, version 2
Comments
boled wrote  Jul 30 2010 at 9:22 AM  
So where is the fix. I'm getting a claims authentication error on Sharepoint 2010, I'm pointed to this page which tells me I need a hotfix, I dont want to search the list of other available hotfixes I just want to download the fix and get on with my work!

brycedwhite wrote  Jul 30 2010 at 12:51 PM  
Click on the 'Downloads' tab above the article.

callahan wrote  Aug 30 2010 at 5:27 AM  
There needs to be text on this page flatly saying (or maybe a link) that the downloads tab is where you get the hotfix. I am used to technet articles, where the link is in the article.

PinkyAndTheBrain wrote  Sep 1 2010 at 12:47 AM  
Direct link to the download would be good.
Like 'boled' I am using CBA in SP2010 on Win2008R2. I assume I need the Win6.1 (Win7) download - this could be clearer.

guido_puchi wrote  Nov 10 2010 at 12:58 PM  
didn't work for me.... same as "boled" and "pinky" using Win2008 R2 STD, MOSS 2010.... have downloaded the Win7 fix....

Smeikkie wrote  Nov 17 2010 at 7:52 AM  
I have the same problem as guido_puchi. Wich update do has to be applied for this.

tokaushal1987 wrote  Dec 8 2010 at 3:23 PM  
For Win2008 R2 you can download the Windows6.1-KB979917-x64.msu (Win7), It is working fine for 64 bit.

dand wrote  Jan 30 2011 at 12:34 AM  
this break Commerce Server 2009, on Win 2008. Please fix it!

luther wrote  Feb 10 2011 at 2:52 AM  
After installing this hotfix and restart the server ,i was still asked to install the hotfix.And when tried to install it again ,i was told this hotfix has been installed.My server is 08R2 and the hotfix i installed was Windows6.1-KB979917-x64.

sesit wrote  Mar 16 2011 at 11:13 AM  
Installing Exchange 2010 on Server 2008 Ent. SP2 and have been directed to this page to install prerequisite hotfixes on the servers, and yet these hotfixes are all for Vista or Win7?! Judging by the comments, I'm not convinced I want to install these on my servers. Also, the description for this hotfix in the KB article says it is for Sharepoint, not Exchange. Typical MS...clear as mud.

sesit wrote  Mar 16 2011 at 11:28 AM  
Have just found an article from an Exchange Administrator that helps to make this a bit more clear. For Exchange 2010, you MUST install all of the listed hotfixes or the install won't complete. For Server 2008 SP2, use Vista hotfix. For Server 2008 R2, use Win 7 hotfix. Would it have been too difficult for MS to include this info on the relevant pages?

RCaldas wrote  Mar 16 2011 at 12:05 PM  
Hi, I have SharePoint 2010 installed in the 2008 R2 Standard with SP1. And in Central Administration I have an issue pointing to this KB. I try to install Windows6.1-KB979917-x64 and the installer returns me "The update is not applicable to your computer". Now what? What is the right file to download? Any one can help me?.
Thanks.

TedB wrote  May 18 2011 at 7:19 PM  
I have the same issue as RCaldas. I have 2008 R2 Standard. 2 days ago, the health and monitoring warning about requiring an update was not present. I updated to SP1 earlier this morning. Now the warning has appeard. Downloading the windows 7 x64 msu shows me "This update is not applicable to your computer" - Does the MSU need to be extracted and tweaked, or a registry setting changed to bypass the check that causes this install error? Please advise.

westerdaled wrote  Jun 6 2011 at 7:13 PM  
Yep, I have same issue as both TedB and RCaldas on a win2008 R2 X64 Sp1. Has anyone notified Microsoft regarding this one?

pagliuca_s wrote  Sep 20 2011 at 9:13 AM  
Any update about the correct hotfix installer?

Jaybone wrote  Jan 11 2012 at 4:57 PM  
Looks like the reason for "The update is not applicable to your computer" is that the hotfix is already included in 2008 R2 SP1.
Would be nice if MS docs that refer to this hotfix stated that it is unneeded if sp1 is installed.

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