To fix An operating system wasn’t found error on Windows computers, first check if the Disk Type is GPT or MBR, and then follow these steps.

Perform System Restore At times, a faulty Windows update, a rogue app, or unwanted system changes can cause your Start menu to disappear unexpectedly.

Short story: I had grub installed, fresh installed Vista RC1 to a partition, no no GRUB. When I tried to restore it using a Kubutu 5.10 CD it said that it failed to install. On reboot it now says ...