Okay, so I'm running Windows 7 and every time I press the S key, my screen fades white and my curser is replaced with a crosshair. I am also using Mouse Keys due to a mouse failure, but I've already tried turning it off to see if the problem goes away to no avail. I have also restarted my computer a handful of times. Google has turned up nothing on the issue and I am at my wits end with this damn thing.