I found this in a few different places around the 'net - hopefully it's helpful:
Turn On the Sticky Keys Feature
When a shortcut requires a key combination, the StickyKeys feature lets you press a modifier key, such as Shift, Ctrl, Alt, or the Windows Logo key, and have it remain active until another key is pressed.
- Press the Shift key five times. A dialog box opens with instructions on how to set up the StickyKeys feature.
- If you click OK, an icon (a group of squares) appears in the notification area.
- To turn off StickyKeys, press the Shift-key five times.