I am trying to get my daughters computer up and running for her.  It's an AMD Athlon 1.15ghz processor, and I just had a new motherboard installed along with 512 mb of RAM.  She was having freeze ups and random rebooting problems.  I took the computer to a tech and had the install checked out because it was still random rebooting.  Seems some "thermal grease" was not applied and the processor was overheating.  Now comes the problem...they installed my Windows XP with a boot disk for NT.  Now I can't uninstall XP, which is not needed on this machine because it will only be used for games by my young grandkids.  I have down loaded boot disks for both Win 95 and Win NT.  Can't get NT boot to work because files were to large for floppy and I can't get the system to boot up to CD.  I can boot up with Win 95, but the system won't recognize my hard drive.  All I want to do is format "C" drive so I can load Win 95 or Win NT.  What am I doing wrong?  When I give the command at A: prompt to format c:, it tells me "invalid drive".  I am only a novice at this, so any help given would be appreciated and keep the lingo so I can understand...please!!

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