It took me more than a week to track this down, but after installing the most recent Adobe Reader (9.3.4) my mouse wheel became disabled and in the mouse control panel applet, the Wheel tab is not visible.
It takes more than a simple 'Restart' for the problem to become apparent (and to be...
adobe reader
amd processor
bug fix
compatibility issue
control panel
digital pdf
lenovo
mouse settings
mouse wheel
pdf
readerupdate
software update
system shutdown
t43 thinkpad
troubleshooting
ultrnav
uninstall
upgrade
user experience
windows 7