If you’re getting Windows Update errors, try using the online fix-it tools available from Microsoft. If you want to force it to download and install now, open Windows Update and select the check box next to the Service Pack 1 entry, click OK, and then click Install Updates. The Windows Update package should download automatically overnight.

You can download separate installers for 32-bit and 64-bit Windows 7 versions Most users will also want to ignore the four symbol files, which are for use with debug versions of Windows. The ISO file (7601.17514.101119-1850_Update_Sp_Wave1-GRMSP1.1_DVD.iso, 1953.3MB) is for IT pros who want access to all three SP1 installers in a format that can be burned to DVD. The Microsoft Download Center requires validation after you pass that check, you’ll have the option to choose from multiple versions of the Service Pack code. I’ve just completed the installation on a test system here it went very quickly. If you only have one or two PCs to upgrade, I advise waiting until the installer shows up on Windows Update later today. You can find it at the Microsoft Download Center. As promised, Microsoft today officially released Service Pack 1 for Windows 7 (all editions) and Windows Server 2008 R2.

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