1. A fdisk and format essentially wiped out the NT/2000 user accounts. Such are not hidden but just not there. Use the tools to create accounts as you see fit.
2. Windows ME doesn't do NTFS. I know of no free tool to convert NTFS to FAT32. You'll need to delete the partition and create it as you want. Bye-bye data.
In closing, it's my opinion you are not using Windows 2000 NTFS to your advantage. NTFS is damage resistant (not damage proof) and the addition of ownership and rights to such could have limited the amount of damage the virus caused. With fat32, the volume had no restrictions so any account or program can run without restraint. I don't feel any speed loss on NTFS.
Bob
I have a 200 GB drive, split into a 100 GB C: and 100 GB D: drive (both running Win2000 with FAT32). I was recently hit with a suspected virus, which ruined my C: drive. I chose to reformat using FDISK and FORMAT of a Win98 boot disk, then reinstalled Windows 2000. My problem is, when I went to re-establish my previous administrator account, "Dad," it said there was already an account under that name. But checking the list of users (Control Panel-Users and Passwords), there's only Administrator and Guest showing. I can't see the "Dad" account.
How do I either erase the old "Dad" account or get it to show up in the User list?
P.S. This is also the problem on a different PC, where I chose NTFS after reformatting instead of FAT32. This machine was NOT hit with a virus: it was to have been a clean install from a previous WinME setup.

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