How to Troubleshoot Rundll32 EXE Not Responding

1. Click "Start," then "Run," or click "Start," "All Programs," "Accessories," then "Run," depending on your operating system. Type "msconfig" into the dialogue box, then hit "Enter" to launch System Configuration.
2. Select the "Startup" tab. Expand the "Command" field and search for "rundll32.exe."
3. Uncheck the box next to any startup item in the list containing "rundll32.exe" in its Command field.
4. Click "OK." Press "Esc," "Shift" and "Ctrl" simultaneously. Select the "Processes" tab when Windows Task Manager appears.
5. Click the "Description" tab, then search for a process with the same name as the startup item you disabled previously.
6. Right-click the item, then select "End Process." Click "End Process" again. Restart your computer.
7. Press "F8" before the OS startup screen appears, then select "Safe Mode" from the list of options. Hit "Enter" to enter Windows Safe Mode.
8. Run your antivirus and a registry repair software to remove any viruses, malware or registry errors from your PC. Restart your computer.
9. Relaunch System Configuration. Check the box next to all of the startup items you disabled. Click "OK" and restart your computer.