Did you install any updates recently? I know my 2730p has been bugging me to install an updated Wacom driver of some sort, but I haven't let it install that update yet. If nothing is currently working right, I would start by going into the device manager and uninstalling anything pen or wacom related. After a reboot, windows might try to install drivers automatically itself, which might work. Or at least you would have a clean slate for installing drivers from Lenovo for the digitizer.