Hi,
Check if you can get the latest drivers for your webcam from the device manufacturer’s website.
If you cannot find the driver, then try to install the XP driver in XP compatibility mode in Windows 7.
Refer this article for more information:
**http://windows.microsoft.com/en-CA/windows7/Make-older-programs-run-in-this-version-of-Windows**
Regards,
Afzal TaherMicrosoft Support Engineer