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How to fix Rundll32.exe error in Windows 10?

Alton Alexander
By Alton AlexanderUpdated on June 4th, 2022

The rundll32.exe error is a very common error code that can occur on Windows 10 computers. This error code can be caused by a variety of things, but the most common cause is a corrupt or damaged system file. When a system file is corrupt or damaged, it can cause the rundll32.exe file to become corrupt or damaged as well. This can lead to the rundll32.exe error code being displayed on your computer.

Users typically search for a solution by asking about:

  • error code rundll32.exe
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1. Restart your computer in Safe Mode and run a virus scan

  1. Restart your computer.
  2. When the computer starts up, sign in to your account.
  3. Click on the Start button.
  4. Type in rundll32.exe and press Enter.
  5. Click on the OK button.
  6. Click on the Scan button.
  7. When the scan is complete, click on the Fix Errors button.
  8. When the Fix Errors window appears, click on the Next button.
  9. Click on the Repair All button.
  10. When the Repair All window appears, click on the Finish button.

2. Use System Restore to revert your computer to a previous state

  1. On your computer, open the Start menu and search for "System Restore."
  2. Click System Restore in the results.
  3. On the System Restore window, click Next.
  4. On the Select a restore point window, select a restore point.
  5. On the restore point window, click Next.
  6. On the Select a restore point window, select a restore point.
  7. On the restore point window, click Next.
  8. On the Confirm restore point selection window, click Yes.
  9. On the System Restore window, click Next.
  10. On the Restore settings window, select the Restore my computer to an earlier state check box.
  11. On the Restore my computer to an earlier state window, select a restore point.
  12. On the Restore my computer to an earlier state window, click Next.
  13. On the Restoring your computer window, click Start.
  14. On the restore my computer window, click Finish.

3. Run a malware scan with a reputable anti-malware program

The first step is to open the anti-malware program and click on the “Scan” button. You will then need to select the “Windows” option from the scan type drop-down menu and select the “File System” from the scanning category. The anti-malware program will then start scanning your computer for malicious files. If the program finds any malicious files, it will display a list of them and suggest how you can fix the rundll32.exe error. If you decide that you want to fix the rundll32.exe error on your computer, you will need to delete the malicious files. You can do this by using the anti-malware program’s removal tool or by using your computer’s standard removal tools. After you have deleted the malicious files, you will need to restart your computer. If you have installed the anti-malware program on a Windows 10 computer, you will need to restart the computer after you have fixed the rundll32.exe error.

4. Use the Windows System File Checker tool to repair corrupted system files

  1. Open the Windows System File Checker tool by clicking on the Start button, typing "systemfilechecker.exe" and pressing Enter.
  2. Click on thetab and select the check box next to the file or folders you want to scan for corrupted system files.
  3. Click on thebutton to start the scan.
  4. If the scan finds any corrupted system files, the tool will display a list of the files and the associated error code.
  5. You can then click on thebutton to repair the files or folders.

5. Re-register the rundll32.exe file

  1. Open the "Start" menu and click "Run".
  2. Type "rundll32.exe" (without the quotation marks) and press Enter.
  3. If you are prompted for an administrator password or for a domain controller, type the password or the domain controller name, respectively.
  4. If you are prompted for a path to the rundll32.exe file, type the path to the file.
  5. If you are prompted for a module, type the name of the module.
  6. If you are prompted for a command, type the command.
  7. If you are prompted for a filename, type the filename without the extension.
  8. If you are prompted for a folder, type the path to the folder.
  9. After you finish re-registering the rundll32.exe file, close the "Start" menu and the "Run" window.

6. Repair any damaged Windows Registry entries related to rundll32.exe

The following steps can be followed in order to Repair any damaged Windows Registry entries related to rundll32.exe in order to fix rundll32.exe error windows 10:

  1. Start Windows 10 in Safe Mode by restarting your computer andpressing the “F8” key repeatedly until the “Safe Mode” screen appears.
  2. Click on “Advanced Startup” and click on the “Restart” button.
  3. On the “Restart” menu, select the “Safe Mode with Command Prompt” option.
  4. When you are in the “Safe Mode with Command Prompt”, type the following commands one by one and press Enterafter each one: net stop rundll32 net start rundll32
  5. If the error message “Rundll32.exe not found” is still appearing on your screen, type the following command and press Enter: regedit
  6. After the Registry Editor has opened, delete the following keys and values if they exist: HKCU\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\Rundll32 HKCU\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\Rundll32.exe HKCU\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\Rundll32.ini
  7. Close the Registry Editor and restart your computer. If the error message “Rundll32.exe not found” still appears on your screen, type the following command and press Enter: regedit After the Registry Editor has opened, delete the following keys and values if they exist: HKCU\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\Rundll32 HKCU\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\Rundll32.exe HKCU\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\Rundll32.ini

If the answers above didn't work then you should also try:

  1. Clean out your computer's junk files.
  2. Update your drivers and operating system.
  3. Perform a clean installation of Windows.