HELP! Computer won't boot... volsnap.sys

I have a Toshiba isatellite A215-S5849 With Windows Vista


I've tried everything to reboot... it won't work. Even tried with the recovery CD. I keep getting this error on the blue screen.


STOP: 0x0000007E (0xc0000005, 0x85B1F0AE, 0x8654FBA0, 0x8654F89c)


Volsnap.sys – Address 85B1F0AE base at 85B1A000, DateStamp 477918f92


Any help would be greatly appreciated!!!
Thanks
Sheri