So I never actually reformatted my system without reformatting both drives ( I have 2 HDs, one for the OS and games, and the other primarily for data ). My question is, if I reinstall windows xp with sp3, and leave the other hard drive unformatted ( the data one that mostly contains data files like music files and such ) will it work properly or will I run into any snags? I'm guessing I may run into a few issues because there are some minor programs ( like bench testing ones ) installed on this "data hard drive" and anything that had any stuff connected to the registry will be enabled useless.