If you press the SHIFT key five times in rapid succession it will ask if you would like to turn on StickyKeys.  If you click OK, it will turn on StickyKeys.  StickyKeys is an accessibility option in Windows that allows for someone to use the CTRL, ALT or SHIFT keys one key at a time without having to hold the keys down.  

To turn StickyKeys off:

  1. Click on the Start button
  2. Click Control Panel
  3. If you see “Pick a category” with 10 categories below, click Accessibility Options, and then click Accessibility Options again. If you just see a list of items, double-click on Accessibility Options. 
    • If you don't see that, try Ease of Access, then Ease of Access Center, then Make the keyboard easier to use.
  4. Under the Keyboard tab, the top section will be called StickyKeys.
  5. Uncheck the “Use StickyKeys” box in the StickyKeys section.
  6. Click OK.
  7. Close out of the Control Panel window.