Windows 7: Uneven Trackpad Sensitivity with Synaptics PS/2 Trackpad

Hello!

My hard drive recently died, so I got a new one and set it up to triple-boot Bodhi, BackTrack, and Windows 7.

Upon completing the 7 install, I noticed that the trackpad's sensitivity is uneven - it responds much more to up-down movements than to left-right movements. Seems it's interpreting my motions on the 16:9 trackpad as though it's 4:3. I thought that the problem might be solved by installing the Synaptics driver available at Synaptics Touchpad HP Pavilion dv6-1122us Entertainment Notebook PC - HP Customer Care (United States - English). Installing it, however, made no difference. I've fished through both the Windows and Synaptic mouse settings dialogs, and found no options which helped.

I know it's not a hardware issue - the trackpad sensitivity is exactly what I expect under both Bodhi and BackTrack, and it worked fine on the 7 install I had before the crash. An hour's Googling produced no results (except for, funnily enough, Linux systems having the issue). I only need Windows bare-metal for a little bit of gaming here and there - if I can't get this resolved, Windows will be relegated to a VM for classwork. But I don't want to do that. Have any of you run in to this issue before?



Thank you!
-jvellos