I'd estimate 50% of the time I start my computer I had to unplug and replug in my mouse or keyboard or both. Once in a while, at the Dell bios boot screen, before the windows loading screen happens, the dell bios loading white bar fills 90% of the way and the computer stalls there. Not sure if the problems are related.
I have gotten a BSOD in the past as well, it had USB in the title of it... next time it happens I will write the whole thing down.
I tried Dell tech suport but they are a nightmare!