win 98 is a client whereas win NT is a server..
Windows 98 uses an older technology based on DOS, Windows 2000 is based on the NT Kernel. Sometimes Windows NT OS's don't work right with old dos files.With a clean install, you get a fresh start. With an upgrade, problems with applications or the OS may follow you into the new load.Install off of your Windows 2000 CD and then have Windows search for your Win 98 CD when it checks for valid upgrade path.
Windows XP
There are very few similarities between Windows 98 and Windows NT, other than a similar interface.
Windows NT is what Windows 2000 is upgraded from.
Windows 2000 was the upgrade path of Windows NT 4, for both the Workstation and Server versions.
98 is a hybrid 16/32bit utilizing OS, as where NT is full 32bit. - Alex C
Windows NT is advance technology than Windows 98. Hence when you boot your computer using Windows NT you will be able to all FAT32 partition. However, If you use Windows NT file system like NTFS than you won't be able to access this from Windows 98. As Windows 98 can only access MS DOS/FAT32 kind of partitions.
Upgrades your previous version of Windows 98, Windows ME, Windows NT 4.0, or Windows 2000 in unattended setup mode. All user settings are taken from the previous installation, so no user intervention is required during setup
Windows ME and NT 4.0 SP6
NTFS
By what year it was made in like 1999 it is a windows nt. A 1998 Is a windows 98
windows 95 windows 98 windows XP windows NT windows ME windows vista windows 7