What Is Rudll32.exe?
Rundll32 is the acronym of Run Dynamic Link Library 32-bit.
Rundll32.exe consists of machine code, so you could trigger a function exported from a 32-bit DLL.

It is written to specifically trigger DLL functions that are explicitly written to be called by it.
Initially, rundll was only used internally at Microsoft, but is now available for general use.
Rundll32 loads and runs a 32-bit DLL and distributes multiple DLL libraries in the file systems memory.
Why Do You Have Multiple Instances of Rundll32.exe?
But the official Windows rundll32.exe is safe and will not harm your box.
How to Recognize Suspicious Variants?
How to Identify Fake Rundll32.exe Processes?
Step 1: Typetaskin the search box next toCortana.
Step 2: ClickTask Manager.
Step 3: ClickDetailsin theTask Managerwindow.
How to Fix Rundll32.exe Windows 10 Error?
There are 7 efficient methods for you to fix rundll32.exe error Windows 10.