Originally Posted by yancek
After formatting the Opensuse partition, you got a Grub error becaus over 99% of the Grub bootloader was on the partition you formatted.
Well maybe not over 99%, but a lot anyway
Many people seem to think that you somehow "uninstall" an operating system. I haven't met such an operating system yet..maybe because if an operating system was a piece of software you could uninstall, what would you then call the thing it was installed on? Operating operating system?
You remove any operating system (that I'm aware of) basically this way:
- if it uses a bootloader that does not work without it, install a bootloader that can boot your other operating system
- after you can boot your machine independently of the OS-to-be-removed, format or delete the partitions that the OS-to-be-removed occupies
- re-use the formatted or now empty disk space for your other operating system
In the case of Windows people usually want the Windows bootloader back. For that they usually need to use the Windows Recovery Console available at the Windows installation media -- or if it's not available (not everybody has Windows installation discs anymore), you can seek the web for the Recovery Console alone. I remember seeing a download place where somebody had put a small disc image (that you could write to a CD-R and get a bootable Recovery Console disc) that looked like Windows installation disc but only contained the parts needed to run RC. Then there's also Super Grub Disk if you can't find anything else