Getting the following errors when doing a backup to a drive that is regularly used.  This is Ghost 10 running on XP Home Edition, SP2.  The destination drive has triple the space needed for an uncompressed backup.  I did the last backup a month ago with no problems.

Error EC8F17B7: Cannot create recovery points for job: Recovery point of C:\.
--Errors exist.
---VSS object not found.
----Error E7B70001: Win32/Win64 API DeviceIoControl(IOCTL_SNAP_VOLUME_EX) failed.
-----Error EBAB03F1: The requested resource is in use.

I am not sure what the "requested resource" is referring to.