I've been using a tweak program called TweakVI (This is the vista one instead of XP) and I clicked virtual desktop. After 5 seconds the whole screen turned black, 2 seconds after turned back on. But now half of my stuff is gone....... Luckily none of them were system files but unluckily most of them are my homework. So my main question is what are some good data recovery software I can use? Or is there another way?