Troubleshoot problems installing Windows 7 Service Pack 1

When installing a service pack for Windows 7 or Windows Server 2008 R2 you might get an "Installation was not successful" error message. The most common causes of this problem are:

An inconsistency in the Windows Servicing Store. The Windows Servicing Store is a feature that is required to successfully install the service packs.

A program on your computer, such as an antivirus or antispyware program, is interfering with the installation of the service pack.

To solve this problem, try to install the service pack again

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