Until you probably became a victim of fraud or a trojan lol no offense i just mean that Vista atm sucks to many flaws in it.
I personally ain`t used all OS but from the ones i have used probs say.
Windows 98
Taught me he basics of computers
Windows 2000
Helped me improve/get competent at using a computer
Windows XP SP2
Is the one i`m using now and have no problems against it.

The only good thing i can think about vista is the chess

Carl