>If he does fdisk and removes the NTFS c: partition is there a risk that the other partitions will be effected - lost data etc?
You betcha there is. It is very susceptible to human error. Be extremely careful and be sure you know which partition is which. Murphy likes this one more than just about anything else he can make go wrong. There is absolutely no substitute for a good backup before doing something like this. If your friend doesn’t read and follow http://duxcw.com/digest/guides/hd/rules.htm tell him or her not to come crying to me. It can be done and I have done it many times. I have also been bitten more than once for doing it.
I'll add that I would not go back to 98. XP is superior. I am in the market for a cheap (real), unactivated, legal copy of XP. Larry