Question Rundll32 causing lag in Windows 10 ?

[Matthew Smothers]

So when I look at Task Manager I see either 1 or 2 (or more) of the process Rundll32, when they are running like that, I see that my system is lagging, but when I end the process, my system seems to run fine, I have opened the file and it is real and coming from system32, why is Rundll32 lagging my PC?
they process full name is "Windows host process (Rundll32)"

 

[Lutfij]

Run malwarebytes and see if you pickup any stowaways on your platform.

Please list the specs to your build like so:
CPU:
CPU cooler:
Motherboard:
Ram:
SSD/HDD:
GPU:
PSU:
Chassis:
OS: include the version of the OS, not the edition
Monitor:
include the age of the PSU apart from it's make and model.

 

[Matthew Smothers]

Run malwarebytes and see if you pickup any stowaways on your platform.

Please list the specs to your build like so:
CPU:
CPU cooler:
Motherboard:
Ram:
SSD/HDD:
GPU:
PSU:
Chassis:
OS: include the version of the OS, not the edition
Monitor:
include the age of the PSU apart from it's make and model.

I ran a virus scan, and nothing showed up, when Windows host process (Rundll32) does show on the task manager, I select "Open file location" and it opens in system32, so I don't think it's a virus causing lag

CPU:i7 7700
CPU cooler: Cooler Master
Motherboard: ASUS
Ram: 32gb DDR4
SSD & HDD: almost 20tb (2-SSD/4-HHD)
GPU: GTX 1080 & GTX 1070
PSU: Unsure
OS: Windows 10 Pro 19045.3086
PSU Age: Unsure

 

[hotaru.hino]

You might be able to track down the culprit using Process Explorer. Follow what the user in the selected answer in https://answers.microsoft.com/en-us...pu-usage/71cd4101-4a3c-48e7-b43a-4646a4be42ac did

The general idea is you may have some program installed that's misbehaving.

 

[stonecarver]

Rundll32 usually kicks up with older games from pre our 64bit systems. To see what I mean have task manager up, bring up Steam and before you say kick up something like Half life 2 look at task manager and no Rundll32 running. start game and there it is. Sometimes when you stop the game Rundll32 will not unlatch. Not a big deal just right click and end process. Yes a pain in the ... but on computers where this seems to act up I just pin Task Manager to taskbar and easy to deal with but still a pain. Hope this helps

 

[Matthew Smothers]

Rundll32 usually kicks up with older games from pre our 64bit systems. To see what I mean have task manager up, bring up Steam and before you say kick up something like Half life 2 look at task manager and no Rundll32 running. start game and there it is. Sometimes when you stop the game Rundll32 will not unlatch. Not a big deal just right click and end process. Yes a pain in the ... but on computers where this seems to act up I just pin Task Manager to taskbar and easy to deal with but still a pain. Hope this helps

Is there a way to make like a bat file or something that when I launch it, it kills the Rundll32 process so I don't have to use task manger all the time?

 

[hotaru.hino]

Is there a way to make like a bat file or something that when I launch it, it kills the Rundll32 process so I don't have to use task manger all the time?

If there are multiple instances of run32dll.exe running, then this could cause issues, and there's likely no way of knowing the exact one to kill.

 

[Matthew Smothers]

If there are multiple instances of run32dll.exe running, then this could cause issues, and there's likely no way of knowing the exact one to kill.

when I boot up the PC, I load up Task Manger and see two Windows host process (Rundll32) and I end task both of them and the PC seems to stop lagging, and both Windows host process (Rundll32) open to System32

 

[Matthew Smothers]

So I found a way to kill Rundll32 with a Bat file, and yes it killed both when I loaded it up, then made a shortcut to the bat file and made that shortcut run as admin and it works

-CODE-
@Echo off
taskkill /f /im rundll32.exe
pause
-CODE-