Attempting to make a complete system backup using Backup and Restore Center
in Windows Visa Ultimate (which I have done successfully before on a terabye
external hard drive) just failed, on the same drive, immediately. Here's the
error:

The backup failed. Failure in a Volume Shadow Copy Service operation.
(0x807800A1). Additional information: The writer experienced a
non-transient error. If the backup process is retired, the error is likely
to reoccur. (0x800423F4)

It was correct; it failed on retry. Help!
--
David Kirk