FluffyChicken":2jkuq4aj said:You could try just puttin ghte old harddrive in and booting. May work, may not
It won't work very well. I transplanted a hd from an old PC to a new one. It caused no end of hassle as the drivers for the mb and vga card were completely different. It made no difference trying to uninstall them and installing the new drivers. The system was far less stable than when doing a clean install.
Just wipe the disc (after you've saved everything you want to keep) and do a clean install. You'll have less headaches in the future, that way.
The best thing to do is just go Linux which is free and far more reliable than Windows anyway.