hi i just ordered one of these (scroll to the description) and i have a question. i have an emachines t1220 and im planning on putting its hard drive in this new machine. im buying the cpu and memory but im using everything else from the emachines- graphics card, hard drive, dvd rom. so my question is, if i put my old hard drive in this new pc, will it just be like turning on my emachines with different hardware (windows booting up normally with all the junk on the hard drive still being there) or will i have to wipe out the hard drive and put it in and then install windows and everything, fresh start? i dunno how to explain it really but if you understand my question i would eppreciate the help. thanks!