Oh come on Malakim, I'm sure you've had programs crash, especially IE(though I use IE)/explorer(file browser)/exlprer(shell).

And DeViLbOi, I didn't know ATI depends on Explorer (I have an ATI... I think Radeon 9700 Pro). What problems were you experiencing? I might be seeing some right now...

I suggest SpyBot as an Anti-Virus since it's completely free with out any limitations. (otherwise, I would try out AdAware but the active protection is disabled unless you pay)