0x80004005 - Unspecified error

MSX 2007 has been uninstalled and we are attempting to remove all links to Backup Exec 2010.

I was able to remove obvious links (folders and resources) but, BE2010 failed with the below message:-

Backup- CBBBD-M3-MEU02.wi.cibc.com
 - AOFO: Initialization failure on: "Microsoft Information Store". Advanced Open File Option used: Microsoft Volume Shadow Copy Service (VSS).
Snapshot provider error (0x80004005): Unspecified error
Check the Windows Event Viewer for details

From the Managed selection listing:-

1. I removed the Server name from Favourite resource

2. removed all folders relating to MSX Server from thr View Selection Details panel.

Obvious, I have not complete the deregistration process properly. What else am I missing?

Please advise