The past couple days I have been getting random restarts, errors in applications, even in explorer.exe.

Today, it restarted on me, then I got an error in DrWatson32.exe...when it restarted i got a blue screen with UNMOUNTABLE_BOOT_VOLUME...

Is my HD gone? It's a maxtor 60 gig... I tried booting to safe mode but get the same BSOD. Any ideas? Thanks.