trying to do a windows 7 backup to a usb drive. It fails whether I am logged in as a user or admin. "Windows backup failed while trying to read from the shadow copy on one of the volumes being backed up. Please check in the event log for any relevant errors." Error code 0x81000037. In the event viewer I see a lot of messages. I don't see anything backup related.
Why would the backup be failing? Where to look in the event viewer for the error message?
The day before I used this USB drive to backup a windows server. So I am sure it is working.