Don't delete it!

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"You laugh because I'm different. I kill all of you because you're the same."

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Well, it depends on where the file is. Any old virus can name itself rundll32.exe and plant itself in your system HOWEVER, this is also a file needed for Windows to run, and unless youre 100% sure that it's a virus or some sort of infection DON'T DELETE IT. It's best just not to touch anything in your C:/Windows/ directory.

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Basically. Get a virus scanner and generally you can right-click on certain files and scan them for virus'.

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"You laugh because I'm different. I kill all of you because you're the same."

The rundll32.exe file is located in the C:\Windows\System32 folder. In other cases, rundll32.exe is a virus, spyware, trojan or worm

There are ways to get around it, though.

But in your case, I wouldn't recommend deleting it, unless you're bored and want to reinstall Windows.

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When a man leaves his darkness, he follows the Son.