Microsoft were a bit crafty here. Do you have your hard disk partitioned? That would allow you can move personal files to a back partition, and then trash C
Assuming not, back up all personal stuff, then try and install Win98 from within 95. If not, boot to DOS A: with the 98 boot disk(don't reboot to DOS prompt from Windows - use a boot floppy) and then run setup from your CD.
On the odd occasion one of them has worked, but in reality Win 98 likes a clean partition!
If you really don't want to trash 95 because of what's on it, try a disk-partitioning system like Quarterdeck's Partition-It. Sometimes it's free on cover disks, or you may know a source.
Come back if stuck :-)
PS - from A

on boot-up, rename your windows directory to something like windows.000. I've known that fool 98, but not every time.
Cheers
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Me, sweat? I'm that cool, it's condensation.
[This message has been edited by matelot (edited 18 September 2000).]