Hey everyone. Its great to be a part of this community. Ok, my situation is as follows. I own one of those pre built POS pc's. I want to build a new system, and ive heard that if you replace a mobo with the existing hard drive, there could be problems. The hard drive has a partition for recovery purposes. My question is, if i replace all the components, RAM, GPU , Mobo, PSU, etc, etc, and keep my old Hard drive,which has XP home, could i just run the recovery partition so i can keep using my old hard drive , or would i have to purchase a copy of windows and reinstall everything. Which is what im hoping i dont have to do. thanks in advanced for the help.