Failed to update backup store

I'm able to DL the updates, but get Unable to install.

2006-12-02 15:46:56 1228 a64 DnldMgr ** START ** DnldMgr: Downloading
updates [CallerId = AutomaticUpdates]
2006-12-02 15:46:56 1228 a64 DnldMgr *********
2006-12-02 15:46:56 1228 a64 DnldMgr * Priority = 2, ServiceId =
{9482F4B4-E343-43B6-B170-9A65BC822C77}
2006-12-02 15:46:56 1228 a64 DnldMgr * Updates to download = 1
2006-12-02 15:46:56 1228 a64 Agent * Title = Windows Malicious Software
Removal Tool - November 2006 (KB890830)
2006-12-02 15:46:56 1228 a64 Agent * UpdateId =
{455D3656-6A56-4BFD-B3F5-748290D16ECE}.100
2006-12-02 15:46:56 1228 a64 Agent * Bundles 1 updates:
2006-12-02 15:46:56 1228 a64 Agent *
{8F04E388-CF23-4648-A1F3-39E2D58C23FA}.100
2006-12-02 15:46:56 1228 4e0 AU >>## RESUMED ## AU: Download update
[UpdateId = {F813D14D-883A-4071-A289-66EF9CAD2ACC}, succeeded]
2006-12-02 15:46:56 3604 9bc DtaStor Update service properties: service
registered with AU is {9482F4B4-E343-43B6-B170-9A65BC822C77}
2006-12-02 15:46:56 3604 9bc DtaStor WARNING: Update Service: Failed to
update backup store