Info about installing SP1 -
http://windowsteamblog.com/windows/b/bloggingwindows/archive/2011/02/16/windows-7-sp1-follow-up.aspx
Steps to take before installing Win7 SP1...
http://support.microsoft.com/kb/2505743
http://windows.microsoft.com/en-US/windows7/Windows-Update-error-800f0826
Windows Update error 800f0826 is displayed when an update forWindows has failed to install and is preventing you from installing additional updates. Error 800f0826 does not identify the update that has caused the problem.
The update that has caused the problem will display a different error. This problem affects updates for
Windows only and does not prevent you from installing or automatically receiving updates for otherMicrosoft programs, such as the
Microsoft Office System.
To prevent error 800f0826, you need to identify the update that's causing the problem (it will display a different error message), fix the problem, and then try installing updates again. Here's how:
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Open Windows Update by clicking the Start button.
In the search box, type Update, and then, in the list of results, clickWindows Update.
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In the left pane, click View update history.
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Find updates for Windows that have failed to install. Updates that have failed will displayFailed in the
Status status column. Make note of the name of the failed update, and then double-click the update to view more information.
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In the Windows Update dialog box, next to Error details, review the error code for the failed update. If the description includes error 800f0826, clickClose, and then repeat steps 3 and 4 until you identify
an update forWindows that does not include error code 800f0826.
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Follow the links in the Windows Update dialog box underMore Information or
Help and Support to try to fix the problem, and then try installing updates again by usingWindows Update in Control Panel.
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If the preceding step didn't work, try the following steps.
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Open Windows Update by clicking the Start button.
In the search box, type Update, and then, in the list of results, clickWindows Update.
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In the right pane, click one of the following links:
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In the Select the updates you want to install dialog box, find the failed update that you noted in step 3, and then clear the check box.
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Click OK, and then click Install Updates.
If you could not find an update for Windows that failed because of an error other than 800f0826, or if the problem persists after you have followed the steps above, an error in another area of the operating system might be preventing you from
installing updates. To request support by e‑mail, go to the
Microsoft Update Solution Center website.
TaurArian [MVP] 01/07/2005 - 30/06/2011. The information has been provided *as is* with no warranties or guarantees. What works for some, may not always work for others.