Originally posted by Rick
More description would be good to have.. Such as specifically WHEN it displays the error message (Boot screen, desktop, login), where the error message appears could be useful as well. Is it s a pop up box? Perhaps a system event viewer error? Maybe it's text during XPs boot... Things like this make it more simple to diagnose.
First, I would try uninstalling anything you think is called NVwtwk. This includes any tweaking programs and your drivers. Then reboot so we can start with a clean slate here. If I'm not mistaken, NVqtwk is an nVidia applet in display propertiers/settings/advanced.
Since NVqTWK is the name of nvidia's configuration applet in Display Properties/Settings/Advanced, I'm going to assume this is a problem with the drivers.
After that nice uninstall/reboot, I would disable your virus scanner and reinstall the drivers (If you have one). The drivers specifically make notice of how anti-virus software can interfere with your driver installation and this is true - I've seen things similar to this before - All because of anti-virus software. I imagine most people are like, "Whatever" about it though.
Once you are done, reboot again and see how that goes. If it still happens, try START/Run/msconfig.exe . Click on the "startup" tab and deselect anything that has to do with rundll and nvqtwk in the path name.
If this turns out to be a system service instead of a program, you can probably delete a key (folder icon) called NVqTWK in START/Run/regedit.exe
Then browse to: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services and delete the properly named key.
Hope that helps some.