How to Restore Rundll32.exe

1. Launch Windows and log in with an administrator account.
2. Click the Windows-logo button on the lower-left-hand corner of the screen. Type 'system restore' into the 'Start Search' box. Click on the 'System Restore' listing in the results.
3. Click 'Next' in the System Restore welcome window to open a list of restore points that you can use to repair system files.
4. Select a restore point made before you began experiencing rundll32.exe errors. Click 'Show More Restore Points' to choose an earlier point.
5. Click 'Next' in the 'Confirm You Restore Point' window to begin the restore process and restart the computer. The rundll32.exe file will be restored once your computer starts back up..