Lately, I have been getting this error. This is quite a pain when it comes to installing some things, like the newest version of iTunes, some games bought through Steam, etc. I also think it may be the reason why some updates aren't installing right away anymore. I also can't access things like...
64 bit
acer
add remove programs
adobe flash player
error
forumguidance
geek squad
help request
installation issues
itunes
reinstallation
repair
software problems
steam
tech support
troubleshooting
updates
user assistance
windows 7
windows installer