BOOTMGR is compressed

[terrier]

HELP!!!!....Foolishly i tried to compress my hard drive to make more space..But now when i turn my PC on it just says "BOOTMGR is compressed.....
press ctrl+Alt+del to restart"

But when i press that it takes me to set up menu and i havent a clue what to do...help.....(serve myself right for messing around eh)

[tacochuck]

Boot from your O/S DVD.

Click 'Repair my Computer'

At the prompt to select your OS installation, click the button that says 'Load Drivers'. This should bring up a explorer-style drive browser.

Then just right-click on the drive you tried to compress, and deselect 'Compress this Drive', which should still be ticked on. Hit apply, and apply to subfolders/files.

Reboot.