I have had a macbook for more than a year now, and what I love most about OSX is time machine. I've lost data on a PC before because of over-complicated windows backup systems. Unfortunately the macbook's horsepower is not enough for me nowadays since I started with HD video editing. I need an upgrade, but can't really afford a quadcore Imac. I could afford a top of the line quadcore i7 if I built a PC, and that's tempting me right now. Does Windows 7 (something I'm not familiar with) have anything like time machine?