The best programs I've used and using it today: Windows XP, Winamp, Windows Media Player (Sort of), Firefox 2.0, Nero 6 The worst programs: Windows Vista (POS OS seriously RealPlayer (Too many bugs and its crap) Norton Anti Virus (All versions), Norton Ghost 9.0 (It was slow and buggy), Nero 7 (A huge disappointment, too many errors) and Valve's Steam engine which is annoying