How to Repair RUNDLL Errors

Backup the Registry
1. Click 'Start' and then right-click on 'Computer' and select 'Properties.'
2. Click 'System Protection.'
3. Click the 'System Protection' tab and then click 'Create.' The 'Create A Restore Point' window opens.
4. Type 'registry backup' into the empty box and click 'Create.'
5. Click 'OK.' The registry is now backed up. This is important because in the next section you will delete a registry entry. Deleting the wrong registry entry can cause significant system-wide errors. Having the registry backed up will help avoid a serious problems if something goes wrong.
Repair Rundll Errors
6. Click 'Start' and type 'regedit' into the 'Search Programs and Files' box and press 'Enter.' The Registry Editor opens.
7. Locate the following registry entry in the left pane of the Registry Editor and click on it.HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\Currentversion\Run\
8. Right-click 'Rundll32.exe' and select 'Delete.'
9. Close the Registry Editor.