If you get a Windows 98 boot disk (you can get one from http://www.bootdisk.com
) and boot with that then you can type in the command fdisk /mbr
. This will make it where the linux boot loader is removed from the MBR (Master Boot Record) of your harddrive. It will them make the MBR point to the windows partition. That will not remove the partitions that have linux on them.