mouse lag problem

[generalkonev]

Suddenly, when I tried to play the game today, the mouse pointer was lagging(moving the mouse and the onscreen pointer slowly and belatedly follows), and the joystick controls were jerky and slow. The video display also stops and starts constantly.

Game is now unplayable because of the mouse and joystick lag. It had been working perfectly before, and I hadn't changed a thing. Computer works fine except with Sturmovik.

I uninstalled the game and re-installed it, but the problem remained. I can't figure out what is wrong. Any help??