I am building a new gaming rig because my laptop overheats too much even on SC Brood Wars. I have all the parts except for the GPU,PSU, HDD and w8.1. I will have enough money for the GPU and PSU before my summer holidays and I'm kinda impatient and I don't want to wait 1 and a half months with a half built PC. So can I use my laptop HDD and it's OS (the os should be on the harddrive) and plug it into my new rig? I have a slot for 2.5 inch components so no problem there. If anyone knows the answer please help.