Restoring Operating System Partition

I have a Symantec Backup Exec 2010 Server Windows 2008.  The OS failed on that box. I have a full backup (snapshot) of the C drive (Operating System location). I want to restore that backup using that box (it is the only tape drive I have).

Can I install a new OS and Backup exec software on that box and overwrite itself? (I think not).

or

Can I move the tape drive to another machine and restore it that way (I do not have a Backup Exec Agent).

or

Am I screwed?