Windows 7 – Unintentional mouse movements, am I paranoid?

I have noticed for a few months that my mouse will randomly jerk across the screen. I’m super paranoid about security. But this is just silly!

Has anyone else experienced this, and found out what causes it? It happens to me every couple of days. The cursor will jump across the screen about 1000+ pixels. I thought it was my mousepad – changed it, and that’s not it.

I imagine it’s just a hardware issue.

This is on a PC with a Razer Naga, wired mouse. The mouse worked for about a year before I started noticing these issues. They have persisted even after a reformat / reinstall.

Solution:

I would suspect, first of all, optical/mechanical issues with the mouse.

Firstly, the optical sensor needs to be clean and free of grease (including invisible fingerprints), fluff and hair – on the outside and inside.  This goes not just for the bit that lights up, but the sensor.

The optical unit is designed to focus at a specific distance, and if it is dislodged or adjusted in any way, then it can not work.  I had a mouse where two of the stuck-on “feet” of the mouse came off, placing the optical sensor a very slight distance (fractions of millimetres) closer to the table/mousepad surface, making the mouse highly unreliable.

It could just be a dodgy mouse.