We picked up a Dell Latitude d600 at a flea market with the hopes of using it for simple surfing and email. No streaming, no editing, no development, just surfing. We were locked out by an admin pw, so I installed Vista with a disk I happened to have. It seems to work, but it is just waaaay too slow. Pretty much unusable on the internet. I tried to do a windows update, and it said it couldn't do it. This was originally an XP machine. Should I install XP instead, would it matter? Or, can I turn off some security stuff? Any ideas appreciated, thanks.