Sounds a lot like a bad hard drive as it keeps corrupting your OS.

Send it in if under warranty, if not, the hard drive can be easily replaced. Trick will be to do a backup of the OS immediately after a successful reboot. You will need the backup to install to the new HD.

There are tons of Youtubes and articles showing how to do this.

If it is truly FUBAR, sell the BR laser on ebay. People are snatching them up for repairs and to make replica phasers.

With great power comes Awesome irresponsibility.