If for any reason you want to uninstall Mandrakelinux, you can do so. The process of uninstalling Mandrakelinux is done in two steps:
Delete all partitions related to Mandrakelinux on your hard drive (usually partitions hosting ext3 file systems and the Swap partition) and — optionally — replace them with a single partition using DiskDrake (see the section called “Managing your Hard Drive Partitions through DiskDrake”).
Remove the bootloader, LILO in this example, from the Master Boot Record (MBR). To do so, execute lilo -U in a console, as root. Doing this will not only uninstall LILO but will also restore the previous master boot record, if any.
If you have a different boot loader, please refer to its documentation to determine how to regenerate the master boot record.