Today when I went to boot into Windows 7, I was surprised to see that the option to boot into Windows was missing in the OS X boot manager (by holding down option). In an attempt to fix this, I installed the rEFIt boot manager. The Windows partition shows there, but once i select it it starts to boot Windows, until I get the following error message:
Missing operating system
I am quite sure that the operating system and all it's data is still there, but I just seem unable to boot into it. What can I do to force my Macbook to boot to it? Am I able to 'rebuild' the boot manager or partition table?