I don’t have any particular exotic hardware on my system, but Windows 7 still struggled to find drivers for basically everything. Screen resolution was limited to 640 x 480, and my external mouse didn’t work because apparently Windows 7 doesn’t have USB support. Bizarre. I’ll spare you the details of what I had to do to get the wireless working, but let’s just say it involved 27 hours of crying.
(not) Quick and (very) dirty: Go to the PS folder, select it, then hold shift and press delete. Answer yes to permanently delete. Get a registry cleaner (e.g. CCleaner, RegScrub, and RegSupreme; you'd find programs like those on download.