I'm thinking of replacing 98 with XP home edition upgrade when available. Main aim is to get rid of instability. I've had to reformat the hard disk and reinstall 98 a couple of times - usually apparently due to corruption produced by NaturallySpeaking. Should I simply install XP over the existing 98, or would it better to clean install in case 98 is slightly corrupted? In the latter case how do I get XP upgrade version to take after 98 has been completely removed and I'm starting with a blank hard drive? Be grateful for any pointers.