hello Shane, thanks for quick reply!
I've just ran the WMI repair tool, but to no avail, unfortunately...
I thought it might have something to do with WMI 3.0 update which was installed by windows update yesterday,
I uninstalled the update, ran the repair tool again, but no. Still the backup won't pick the system32\config up....
In the log there are mentions of "invalid global switch":
Starting Repairs...
Start (15.12.2012 23:44:52)
Repair WMI
Start (15.12.2012 23:44:52)
Step 01/03 - Deleting WMI Repository...
Step 02/03 - Rebuilding WMI Repository...
Step 03/03 - Registering WMI...
Invalid Global Switch.
Invalid Global Switch.
Done (15.12.2012 23:46:15)
Cleaning up empty logs...
All Selected Repairs Done.
Done (15.12.2012 23:46:15)
Total Repair Time: 00:01:23
...YOU MUST RESTART YOUR SYSTEM...
The problems I mentioned started after I resurrected my windows by copying the SOFTWARE file from \system32\config\regbackup using a recovery disc (system wouldn't boot because I thoughlessly installed and then removed a touchpad driver via Revo Uninstaller - a lesson to learn, btw...)
They include this very glitch and others, among which is SFC check stopping at 56% and telling it could not recover some system file...
Seems like I finally screwed up my system, and complete reinstall is imminent (which is the worst option due to a LOT of software to reinstall along with it)