Windows 7 - Mouse Lasso Lag in all programs

I recently got my first computer with Windows 7 and my mouse lags, however, it only lags when I lasso. (The lasso box itself lags behind the cursor, my cursor moves fine.) This problem persists in games such as Starcraft 2. I have tried several USB ports with no results.

My mouse is a Steelseries sensei and the drivers are up to date.

Any help is greatly appreciated.