The normal way to "uninstall" _any_ operating system is to format
the hard drive and install a new OS of your choice.
However, if you performed an upgrade from Win98/Me, elected to
backup the old system files, and didn't convert the partition to NTFS,
then all you need do is boot into Safe Mode and Start > Control Panel
Add/Remove Programs. All of these conditions _must_ be met for the
You will have to go for a format of the hard disk after backing the
operating system.
there is no thing called uninstall of a operating system if it is the only
operating system on the computer.