If you can't get the software or drivers to install right, here's how.
1.Don't use the disc it came with. Go here to get it http://www.logitech.com/index.cfm/435/3056&cl=us,en
2. Choose Windows Vista as the OS then 64 or 32 bit depending if you're running 64 or 32 bit Windows 7.
3. When it finishes downloading right click on it and choose open containing folder. Right click on the software you downloaded and go to properties.
4. Go to the compatibility tab and choose Windows Vista (Service Pack 2) and mark the checkbox "Run this program in compatibility mode for:"
5. Click apply, then ok, then run the software and it should work perfectly.
Hope this helped.