Question Mouse jittery when I press down a button and move the mouse in FPS games

[aeromaster03]

I've been having this problem over different keyboards and different mice so I think it must be my PC, but when, for example, I press W to move forward and drag my mouse to the right, the mouse has jagged movements and I continue walking even after I've released the W key.

Any help on this infuriating problem would be great thanks

 

[aeromaster03]

I've been having this problem over different keyboards and different mice so I think it must be my PC, but when, for example, I press W to move forward and drag my mouse to the right, the mouse has jagged movements and I continue walking even after I've released the W key.

Any help on this infuriating problem would be great thanks