Kensington trackball fix win 7
Apparently Win 7 users have had trouble with Kensington Mouseworks install.
downloaded name will be 76TrackballWorks11Windows.exe
to desktop, or where ever you like.
Right click the icon.
click compatibility tab
click compatability mode- select win xp(sp3)
click priviledge level –administrator
Close the properties window.
Right click and run as administrator.
Reboot if directed to.
This worked on my Win 7 system.
If you have several users you may want to click apply to all users.