hehe, it's a right pain in the arse ain't it?
Most of the time I don't bother with any 'maintenance' on my computer (other than av scanning). Errors get fixed when I perform a format and reinstall every year or two.
Occasionally I get lost in the depths of windows on some quest for better optimisation or error fixing, with all the internet's collected experience at my fingertips. The most usual outcome is a sense of having spent a lot of time for an unclear result.