Hi,
The model number V-UAV35you have mentioned is not available in the Logitech Support Website.
I would suggest you to download the Drivers from the link (http://www.logitech.com/en-au/435/217?WT.z\_sp=Image) provided by you and then save them on your desktop and then run the Installation in Compatible mode.
Note:
Using Third Party Software, including hardware drivers can cause serious problems that may prevent your computer from booting properly. Microsoft cannot guarantee that any problems resulting from the use of Third Party Software can be solved. Using Third Party Software is at your own risk.
To install or run a program in compatible mode refer to the link provided below:
http://windows.microsoft.com/en-US/windows7/Make-older-programs-run-in-this-version-of-Windows
For further assistance on this issue I would suggest you to post your issue on**Logitech Support website** or contact the Webcam Manufacturer.
Thanks and Regards:
Naman R - Microsoft Support. Visit our Microsoft Answers Feedback Forum and let us know what you think.