I've tried everything!! It was jerking, so went to get the firmware and re-calibrate. Took me hours to figure out the driver just wasn't compatible w/ Windows 8. Everything is installed and supposedly calibrated, and it's STILL jerking and won't just point down smoothly like it did before this happened?
Any other ideas? I've scoured the web and did everything. After 3 days of this, I'm still in the exact same spot.