Windows 10: rundll32.exe opens and closes continiously

The last bit " | Clip " sends it to your clipboard. It means you don't see the results unless you paste it somewhere.

Try it without - this is my (normal for 64 bit Windows) result: Code: Microsoft Windows [Version 10.0.16299.64] (c) 2017 Microsoft Corporation. All rights reserved. C:\WINDOWS\system32>Dir /s /a /b C:\rundll32.exe C:\Windows\System32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe C:\Windows\WinSxS\amd64_microsoft-windows-rundll32_31bf3856ad364e35_10.0.16299.15_none_faf17d821c0f060e\rundll32.exe C:\Windows\WinSxS\wow64_microsoft-windows-rundll32_31bf3856ad364e35_10.0.16299.15_none_054627d4506fc809\rundll32.exe C:\WINDOWS\system32>[/quote]

 

Did not realize the "clip" function.
Will try again.

 

Code: C:\Windows\System32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe C:\Windows\WinSxS\amd64_microsoft-windows-rundll32_31bf3856ad364e35_10.0.15063.0_none_e9192ac8e3b94c4c\rundll32.exe C:\Windows\WinSxS\x86_microsoft-windows-rundll32_31bf3856ad364e35_10.0.15063.0_none_8cfa8f452b5bdb16\rundll32.exe[/quote] Mine looks similar to yours.

 

The rundll32.exe file is located at correct folders. If you want you can scan your computer with malwarebytes to make sure your computer not infected.