I have my Win 7 PC set to back up to an external HD and have yet to get a successful backup. The Action Center gives me the message:
Windows Backup failed while trying to read from the shadow copy on one of the volumes being backed up.
When I look in the event viewer, I find the following error:
The backup operation that started at [date] has failed with following error code '2147942405' (General access denied error).
I've searched for that error code but haven't found any useful info. I've confirmed that both the Volume Shadow Copy and SPP Notification services are running. I suspect file permissions may be involved. The files I'm backing up are on both the original C: drive and another internal drive I added. Does anyone have any ideas what the problem might be, or things I should check?