How to Fix a Rundll.exe File

Through Service Management
1. To stop the error through the computer's 'Services Management,' identify the program causing the rundll error. Look at the last file name that ends in 'dll' when the error appears.
2. Click the 'Start' button and select 'Run' from the Start menu. Type 'services.msc' in the Run window.
3. Search for the program identified as the source of the 'dll' error in the 'Services Management' window that appears. Right-click the program and click 'Stop.'
Through Registry Editor
4. To fix the errors through the registry editor, click the Start button and select Run from the Start Window. Type 'regedit' to bring up the registry editor.
5. Navigate to 'HKEY_LOCAL_MACHINE> SOFTWARE> Microsoft> Windows> CurrentVersion> RUN.'
6. Find the corresponding registry key with the program causing the 'dll' error. Delete this and reboot the computer.