How to Fix Rundll Errors for Free

Rundll32.exe is a system process that is an integral part of Windows XP and other Windows operating systems. When the file becomes corrupted, the system may crash or Windows may be unable to load. You should first determine what is causing the rundll32.exe error, fix that problem, then replace the system rundll32.exe file to ensure any remaining issues are resolved.

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A corrupt rundll32.exe file will prevent Windows from running properly.

Step

Run Windows in Safe Mode. Restart the computer. At reboot, press the "F8" key repeatedly. Keep tapping "F8" until the Windows Advanced Options menu appears. From that menu, select "Safe Mode No Networking" and press "Enter."

Step

Run antivirus and antispyware scans. This may take several minutes, depending on the size of your hard drive. Delete any malicious programs that are discovered. Reboot the computer.

Step

Insert the Windows system CD or OEM system recovery CD after Windows has loaded.

Step

Replace your old rundll32.exe file. Click the "Start" menu and select "Run."

Step

Type in the "Run" dialog box (without quotation marks): "expand X:\i386\rundll32.ex_ c:\windows\system32\rundll32.exe" with "X" being the letter of your CD drive. This will install the original rundll32.exe file that came with your Windows software. Reboot.