Well, the reason causing Rundll Error is probably that when you are surfing on line, some Trojan and malware attack your PC and modify the registry for malicious purpose. Though the anti-virus and anti-spyware can remove those Trojans and malware, they cann't repair the destroyed registry. So, Rundll Error happens!
Of course, Rundll Error is not only caused by Trojans and malware. According to our research, mis-deleting registry entries, downloading dubious files, hard shutdown PC etc can also cause Rundll Error.
Thru serious test of our expert team, Perfect Optimizer
can fix Rundll Error 100%, much higher than other registry products.Because Perfect Optimizer
uses a high-performance detection algorithm that will quickly identify missing and invalid references in your Windows registry. With a few easy steps Perfect Optimizer will entirely scan your Windows registry for any invalid or obsolete entries and provide a list of the registry errors found. After that you can choose to clean list items with selection or automatically repair them all.
So when your PC got Rundll Error, it's highly recommended that you download Perfect Optimizer
and repair Rundll Error. Anyone can do it like a computer guru within 5 minutes!