I get this pop up every once in a while that says "sticky keys". I recently have had problems with typing where it seems like the caps lock is toggling on and off.

With StickyKeys, when you press any modifier key (Control, Alt) it remains active until a nonmodifier key is pressed. This is useful for people who have difficulty pressing two or more keys at once.




Steps:
1. Open the Control Panel folder and double-click Accessibility Options.

2. Select Use StickyKeys on the Keyboard tab.

3. Click the Settings button and be sure all the options in the dialog box are selected. Click OK twice. In the taskbar, you'll see three black boxes. This shows that StickyKeys is turned on.

4. Turn StickyKeys off by pressing Shift five times. To turn it back on, press Shift five times, and then press Enter.