Rundll32 errors are caused by a combination of numerous problems including viruses, malware, spyware, or registry errors. Undetected viruses, spyware, and malware can be accountable for rundll32 errors as well as registry errors such as damaged installations of applications or incomplete uninstalls.

A rundll32 error takes place when Windows attempts to load a file but is not able to do so because Windows cannot locate it. The result is this annyoing rundll32 error pop-up that you probably have seen already, Windows cannot locate a file, and a frustrated computer user tries in vain to get their program to load.

You could call an IT specialist who would look for the cause of the problem and fix the rundll32 error or you can try yourself to hopefully find what causes the problem and fix it. Before you mess around with your computer’s important processes and files it is important to be aware that you can severly damage your computer if you remove or alter certain files that your computer uses to operate while you are attempting to fix rundll32 error. Nevertheless, oftentimes the cause of the problem is not too complex and can be fixed by the average computer user.

Whenever you are not sure restart your PC. This should be your first step to repair just about all PC errors, including a rundll32 error. If you continue to get the error after rebooting your system there are still a few steps to take. If you have recently installed or uninstalled a program re-do it as problems with installation and uninstalls can cause rundll32 errors.

In case you didn’t install any software recently make sure your anti spyware and anti virus detectors are up to date and perform a full system scan to find any security threats that are caused by malware.

In case the rundll32 error still occurs you can try a clean boot on your computer which will allow you to isolate and test each system on your computer to see where the error is occurring. To perform a clean system boot type “msconfig” into the run dialogue box. Then choose the selective startup option and deselect all but one choice listed below it and reboot your computer.

Continue to reboot your computer with only one startup option selected to test each system. This procedure should identify what process causes the error. Once you know what process causes the error check the top of the Window that matches the process that has been detected and select the tab. You then select one option below that and continue to reboot your computer until you find the process that causes the error.

In case you don not feel comfortable messing with your system or you simply do not have time to do so, use a registry repair program. There are a few very good registry scanners that can fix rundll32.exe quickly.