Chosen Solution

I hadn’t used the tablet for a while, now it is not recognized by the computer (desktop). Last time I used it, the pen was sometimes erratic, but I could get pen and tablet to work. I have not made change to drivers, but I will maybe try that now. I have tried re-calibrating (per internet instructions). I have tried stopping and starting the processes thru the ‘manage’ command (computer management), all to no avail. What might be wrong? Can I repair? Thanks for any thought. (oh, this is on Win 7)