Re: Windows 7 SP1 RTM
If you are getting the error message that system components are missing when installing Windows 7 SP1 then look at Windows\Logs\CBS\CBS.log. That will tell you the area its failing.
In my case its failing because:
Driver directory C:\Windows\System32\DriverStore\FileRepository\ati ilhag.inf_amd64_neutral_951c1812f542740a is missing
It appears that Driver Sweeper clears the that folder if you ask it to remove all ATI entries. I suspect many people are going to have this issue.