yeah, definitely sounds like a driver issue. That's usually the problem when a computer won't recognize a piece of hardware. Make sure you've got the most recent version of your tablet's drivers installed. You can probably download them from the tablet manufacturer's website.
OK, for starters plug your tablet in yur PC. Try using a different USB port if you haven't already. Sli chances that it might work, since Windows is retarded and installs a device on every USB port separately. If not, leave the tablet plugged in it, go to Start menu, right click My Computer, click "Manage", on the left side of the window there will be a list of services. Select "Device Managment". In it, you should see the tablet under one of the categories, I'm not sure which since I haven't worked with that model, but you will recognize it. Wwhenhen you find it, right click it and select "Uninstall". If you can do this, post here.
"911, what's your emergency?"
"Hello, I seem to be having an overwhelming amount of GENIUS!"