Adding to mark advice, try to run this command:
sfc /scannow
Reboot your machine, does it help?
http://support.microsoft.com/kb/310123
<Q>
Code 19
Windows cannot start this hardware device because its configuration
information (in the registry) is incomplete or damaged. To fix this problem
you can first try running a Troubleshooting Wizard. If that does not work,
you should uninstall and then reinstall the hardware device. (Code 19)
Recommended resolution
A registry problem was detected.
This can occur when more than one service is defined for a device, if there
is a failure opening the service subkey, or if the driver name cannot be
obtained from the service subkey. Try these options:
On the General Properties tab of the device, click Troubleshoot to start the
Troubleshooting Wizard. Click Uninstall, and then click Scan for hardware
changes to load a usable driver. Restart the computer in Safe Mode, and then
select Last Known Good Configuration. This rolls back to the most recent
successful registry configuration.
As a last resort, you can edit the registry directly. For more information,
see the Registry Reference in the Microsoft Windows 2000 Server Resource Kit
at the following Web site:
http://www.microsoft.com/technet/prodtechnol/windows2000serv/reskit/default.mspx?mfr=true
(
http://www.microsoft.com/technet/prodtechnol/windows2000serv/reskit/default.mspx?mfr=true
http://www.microsoft.com/germany/technet/prodtechnol/winxppro/reskit/c09621675.mspx
The registry information applies to Windows XP.
</Q>
http://technet2.microsoft.com/windo...488b-4997-a532-5411872ecbb81033.mspx?mfr=true
HTH.
nass