Turn off Sticky Keys in Windows 7
Navigate to the Control Panel (Figure A) and click the Ease of Access entry.
Click Ease of Access.
On the next screen (Figure B), you should click on the Change how Your Keyboard Works link to reach the screen shown in Figure C.
Change how your keyboard works.
Make the keyboard easier to use.
By default, under the Make It Easier to Type section, most of the items should be unchecked. However, that does not prevent Windows from asking if you want to turn on the features if you happen to press the correct keyboard sequence. To turn off the dialog box and thus relieve the annoyance, you will have to dig a bit deeper.
Click on the Set Up Sticky Keys link to reach the configuration screen shown in Figure D.
Set up Sticky Keys.
On this screen, you want to uncheck the Turn on Sticky Keys when SHIFT Is Pressed Five Times box. That will prevent Windows from asking if you want to turn the feature on.
A related feature is called Filter Keys, which is triggered when you hold the right-Shift key down for eight seconds. You can turn this feature off by clicking the Set Up Filter Keys link found on the screenshot shown in Figure D.
Uncheck the Turn on Filter Keys when Right SHIFT Is Pressed for 8 Seconds box, as shown in Figure F.
Turn on Filter Keys when right-Shift is pressed for eight seconds.