问题 提问于 2015年2月17日
Microsoft Security Essentials will not Install error code 0x004FF91. After reloading windows Home Premium I uninstalled Trend Micro, downloaded the Microsoft fixt it program MicrosoftFixit50535 and OneCareCleanup. Still getting that same error code 0x004FF91.
I did veryify that windows Installer service is running.
None of the tasks I see in task manager appear to me appear to be antivirus or spyware.
Can anyone help?
(I selected "live mail" under product, did not see anthing in that list that was related to Microsoft Security Essentials)
Thanks in advance,
Dave
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