How to download Logitech Quickcam Messenger?

You can go to this page

http://www.logitech.com/index.cfm/support_downloads/&cl=us,en?modelsearch=yes&modelNumber=V-UBC40&submit=Submit

Select your specific camera model based on the picture that is displayed.

On the page that is displayed, there will be a section on the right hand side of the page called software downloads. Click on the link and follow the instructions.