Mythbuntu ate my Windows

Using my notebook I installed Mythbuntu 8.10 on an external USB harddisk, as I wanted to see how MythTV compares to WMC on my HTPC. For some reason (only known to Mythbuntu developers) the installer also also decided to write a GRUB boot loader on the internal harddrive, on which I had HP Drive Encryption enabled.  Goodbye Windows. R.I.P.