What I did to fix this was to give those away and get a new web cam that came with drivers for the OS I use today.
This was the cheap fix and saved me from the lost time of searching for drivers no one could find.
I have a labtech webcam 5.1.0 install disc thats for 98, ME, 2000 and xp..It installs everything then restarts the computer and asks you to plug in the camera(USB).I plug it in but it won't show any picture not even blackness so I can't finish the process.I have xp and I had it working before I reformated the hard drive but I remember downloadinga newer driver than what was on the disc . I can't find the driver to download.The sites I get to are complicated and seem to download other things even though I press for 5.1.0. Does anyone know where the right driver is or what could be wrong?