Vista - Volume shadow copy service failure

Trying to find a resolution to the error below. Current cause Unknown

Volume Shadow Copy Service error: Unexpected error querying for the IVssWriterCallback interface. hr = 0x80070005. This is often caused by incorrect security settings in either the writer or requestor process.

Operation:
Gathering Writer Data

Context:
Writer Class Id: {e8132975-6f93-4464-a53e-1050253ae220}
Writer Name: System Writer
Writer Instance ID: {355cad63-2d20-400b-8ecd-625bb041fb0f}

Event ID 8194 is logged in the Application log when you install the 2007 Office system on a Windows Vista-based computer

I have already looked into this as a possibility however office was installed over a year ago and this is a repeating issue which has started in the past week. No updates, drivers, or new software has been installed in the past week. Nor has there been any changes to system settings.

Hm..Try vssadmin list writers command to diagnose it.In MS Technet there is bit more info about this error http://technet.microsoft.com/en-us/library/cc734235(WS.10).aspx

Here is what I have found going back through video record of os activity.
The vss function that was failing was the system writer however it shows no last error and state (5)waiting for completion. Reboot resolved the issue however it is easily recreated by running U torrent. It would appear that U torrent is not currently vista compatible due to a conflict with VSS system writer. U torrent causes system writer to malfunction due to an improper request to the IVssWriterCallback interface.

Update on this issue. The conflict is caused by utorrent consuming all system resources as a result of removal of TCPIP max half connections limit. Before download speed was unlimited. Capping utorrents download speed at 500kbs has resolved the issue.