Hi,
1. Try rebooting VM in Last Known Good Configuration.
2. If it boots OK, do a normal boot to make sure VM is OK now.
3. If this doesn't help, boot in Safe Mode only.
4. If VM boots into safe mode, re-start VM gracefully from inside VM.
5. Let VM boot through normal process. It should work if I think I know what it is.
Good Luck. :-)