WithSecure plugin Hosting Services uses nearly all memory and CPU

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Hi,
Hope someone can help me!

I have big problems with my Windows 10 PC . It's terribly slow. I have found that there is an application, WithSecure plugin Hosting Services, with three instances running all the time taking nearly all memory and sometimes 100% CPU.

I have no idea how this application has been installed on my computer and why. And it's impossible to stop it from running.

What is this application and how can I get rid of it?

Best regards
Lena
 
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It is part of your anti-virus software. If you have Spectrum or F-secure, it is part of their software. I uninstalled the program, but then Windows defender did the same thing. I've found it on 4 PCs. 3 running windows 11 and 1 running windows 10. I suspect it's a bug in the recent windows updates.
 
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I do not have that plugin on my Windows 11 install as well as my Windows 10 installs. However, I have never installed any third party AV software, so it might be a remnant of such software.
 
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1 was a clean Win 11 install. I even deleted and recreated the partition. On that PC, windows defender was using 300-500 mb of RAM constantly. That's why I suspect it's a Windows bug. Turning off Defender didn't change the RAM usage.
 

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