The most reliable and quickest way to install Windows 7 SP1 is to install manually
Try the SP1 Download:
<http://www.microsoft.com/downloads/en/details.aspx?FamilyID=c3202ce6-4056-4059-8a1b-3a9b77cdfdda >
For 32-Bit Windows 7 download: windows6.1-KB976932-X86.exe 537.8MB
For 64-Bit Windows 7 download: windows6.1-KB976932-X64.exe 903.2MB
Download, *save*, and install the Service Pack with no security software (antivirus/security suite) installed, disconnect from Internet, disable the fire-wall & close all non-essential process in the task manager.
I also recommend taking off USB keys (e.g., flash drives) or any external media as this takes place.
When it is downloaded right-click on the file and select Run As Administrator from the menu. (Please do not use the computer while the installation is in progress)
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Steps to take before installing Windows 7 Service Pack 1
How to increase your chances of installing Service Pack 1 successfully.
<<http://www.pagestart.com/win7sp1steps021611.html>>
Troubleshoot problems installing a service pack for Windows 7
<<http://windows.microsoft.com/troubleshootwindows7sp1>>
How to uninstall Windows 7 Service Pack 1
<<http://windows.microsoft.com/en-US/windows7/uninstall-sp1>>
Free unlimited installation and compatibility support is available for issues related to Windows 7 Service Packs. Availability of chat, phone or e-mail support differs depending on your geographic location. Some issues may require more advanced support for which there may be a charge: <<https://support.microsoft.com/oas/default.aspx?&gprid=14496&&st=1&wfxredirect=1&sd=gn>>
UTC/GMT is 16:48 on Wednesday, May 02, 2012