Supported workaround for torn state installation on Windows 2008 / Windows 7 SP1

1. Download the SP1 standalone package for your architecture here: http://www.microsoft.com/downloads/en/details.aspx?familyId=c3202ce6-4056-4059-8a1b-3a9b77cdfdda
2. Open an elevated command prompt and expand the standalone executable to a folder to get the SP1 .cab file (note the architecture)
• Start /w windows6.1-KB976932-X86.exe /x:.\SP1_Expanded
3. Change to the directory you expanded the files to
• cd SP1_Expanded
4. Use DISM to manually re-install the SP1 cab
• DISM /Online /Add-Package /PackagePath:windows6.1-KB976932-X86.cab
5. Reboot the system when prompted
6. Now open an elevated command prompt and remove SP1 using DISM (again, pay attention to architecture in the commands):
• DISM /online /remove-package /packagename:Package_for_KB976932~31bf3856ad364e35~x86~~6.1.1.17514
• Reinstall SP1 and you should no longer be in a torn state

Please note:  If you have a 64-bit installation of Windows the proper architecture value for the manifest is amd64 (not x64)