Mouse/Touchpad not working.

Have a Dell e6420, running Windows 7 pro.

Problem:

Mouse in Devices only has PS/2 Compatible mouse, installed automatically.

Touchpad is working, although there are no settings for it in the Mouse options. Impossible to increase sensitivity, and it's really slow. Attempted to download drivers from Dell website, tried touchpad drivers version 6, 7, and 11, none worked.

New mouse was installed, driver installed, Steelseries rival gaming mouse was recognized on the Steelseries application, but no response on screen, and error in the device manager. Indicates missing driver for Rival Gaming mouse. Auto-update doesn't produce anything but continues running, requiring shutdown through task manager.

I'm not sure where to look anymore, any advice would be appreciated.