How to Fix Rundll As an App

1. Put your Windows operating-system disc in your CD/DVD drive.
2. Click your 'Start' menu, click 'All Programs,' click 'Accessories' and click 'Run.'
3. Type 'expand D:\i386\rundll32.ex_ %windir%\system32\rundll32.exe.' Replace 'D' with the letter of your CD/DVD drive. This places a fresh new copy of 'Rundll' in your computer.
4. Restart your computer.