All else has failed. Would reinstalling Mountain Lion resolve my uncontrollable cursor?

This is a maddening case of an uncontrollable cursor. Symptoms: 1. Cursor moves on its own; and 2. Trying to use the Macbook Pro trackpad results in either nor response of the cursor, or eractic movements; 3. Cursor moves around the screen opening applications, creating folders, etc. all on its own.

I have tried remedies suggested on this forum. No luck on a solution. Would a reinstallation of Mountain Lion resolve my problem? (Assuming I could get some control of the cursor to effect the download) Any help here would be much appreciated.