Windows Complete PC Backup Error

I get the follow errors when I try to run a complete backup:

ERROR: The read volume shadow copy on one of the source volumes failed.
Make sure all volumes included in the backup are available and accessible,
and then retry the operation. (0x8078008A)

Additional Information:
Access is denied. (0x80070005)

Someone please help me. I really need to backup my computer.

Which version of Vista do you have?

Mark

"MattH" <> wrote in message
news:03927BE8-7243-440C-A30E-...
>I get the follow errors when I try to run a complete backup:
>
> ERROR: The read volume shadow copy on one of the source volumes failed.
> Make sure all volumes included in the backup are available and accessible,
> and then retry the operation. (0x8078008A)
>
> Additional Information:
> Access is denied. (0x80070005)
>
> Someone please help me. I really need to backup my computer.

I have Vista Ultimate.

"Mark" wrote:

> Which version of Vista do you have?
>
> Mark
>
> "MattH" <> wrote in message
> news:03927BE8-7243-440C-A30E-...
> >I get the follow errors when I try to run a complete backup:
> >
> > ERROR: The read volume shadow copy on one of the source volumes failed.
> > Make sure all volumes included in the backup are available and accessible,
> > and then retry the operation. (0x8078008A)
> >
> > Additional Information:
> > Access is denied. (0x80070005)
> >
> > Someone please help me. I really need to backup my computer.
>