I am replacing my old stock motherboard for a Sony Vaio R with an MSI H81M-P33 motherboard and replacing my old Pentium 4 (540J?) with a Pentium G3460. If I reinstall the OS with I lose all of my data on the drive? Windows XP is my OS and I am planning on keeping it because I have another computer that already has Win10. Also any advice on replacing PSU? My old HDD is a Hitachi Deskstar from 2004, how could I make it compatible with the new MOBO?