XP, Vista, and similar operating systems.

Oh my god))) VisTa is taking over the world))) people, don't install it, I'm telling you this as a programmer.;)

Don't compare an ordinary user and a programmer;)
Memory? Well, yes, memory. In my opinion, that's its biggest flaw. However, 600-800MB out of 3.5GB... in general, it's up to you)
ps About how to get rid of those annoying questions. Part one:smile33: