error 641 on .net framework update

May 20, 2012 at 18:41:16
Specs: Windows Vista64 Ultimate sp2, Intel I7 6Gb
After hard drive failure, system was reinstalled and while installing service pack 2 received error code 641 on net framework 3.5 service pack 1 update. Web conversations seem to indicate windows installer may be implicated but MSIEXEC.exe does not exist on my stsem.

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May 21, 2012 at 05:10:49
MSIExec.exe (the Windows Installer Service) should be present in both 32-bit & 64-bit versions of Windows Vista, so if it's missing on yours I would guess that's the cause of your problems:

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