|Solution for 0xc0190005 \Registry\machine\Schema\wcm://Microsoft.. |
Like a lot of others (having searched the net!) I recently encountered the above error when trying to install Vista SP2 via Windows Update.
The concensus seemed to be that you were 'screwed' and you had to re-install Vista and rebuild the machine from scratch. There were lots of similarities between myself and others with the problem - the laptop did once have Norton installed, and did once have AVG installed on it (both had been removed).
I followed quite a few suggestions - remove Norton completely using the Symantec utility, ditto for AVG, run sfc scannow, restore the laptop to an earlier working point, don't connect wirelessly to a router (use an ethernet cable), run chkdsk, try Startup repair, etc....nothing fixed it.
The system startup was ok, the system seemed to run ok, no viruses were detected by anti-virus software and registry cleaners failed to fix the problem.
A lot of the web postings suggested 'solutions' which boiled down to 'buy my company's registry cleaner'...but I'd already proven that a registry cleaner wouldn't fix the problem.
I eventually accepted that I would have to re-install Vista and spend a day re-installing drivers, applications, etc., so I inserted the O/S disk in the CD and kicked off the install.
I decided to try the 'Upgrade' option first (instead of the new install / reformat disk option) - it picked up that Windows Powershell needed to be uninstalled first (?).
Instead of uninstalling (I don't think I was able to?), I disabled Windows Powershell via 'Turn windows features on or off'.
This then enabled me to run the Upgrade option, which took a few hours but completed successfully. I was then able to run Windows Update (approx 180 packages) and one of the upgrades was SP2 - which this time worked!
Problem solved, wihout losing any of my settings or applications.
After SP2 there were another 40 packages to install and in total it took about half a day to get back to a working system with Windows Update now working again.
If anyone has a similar problem, it might be worth first trying to disable Windows Powershell and
then re-install SP2 (before you reach for the Vista O/S disk)?
(Perhaps a Windows Powershell upgrade had failed and caused the registry corruption?)