Vista - Backup Complete Computer error

I can't do Complete PC Backup, error raise: "server execution failed (0x80080005)".
(screenshot attached.)

But I already did 1 successful backup to my external HDD (Seagate Freeagent Go) G: and all was ok.

After some changes in my system and cleaning through McAfee Security Center I receive now error when try to Complete PC Backup.

I tried to remove info on last backup:
Backup Complete PC - Reset Last Backup Listing

But problem persist and I recovered registry keys about last successful backup.

Also I made full CHKDSK of drive C: and drive G: (for Backup) on restart and it didn't help.

Also I disable Spyware and other Security Guards in McAfee Security Center - it didn't help.

Also I create additional Restore point for drive C:. Situation is same.

I made all last updates of Windows Vista Business SP1 and all drivers updates and check with Version Tracker 4.1 - and all is ok. But problem persist.

I discuss in chat with McAfee Technical specialists but no result.
They said that it is Microsoft issue and advice me to open case with Microsoft Support.