What is svchost.exe?

This morning when I opened up my Windows Task Manager, I noticed about 8 svchost.exe running in my background. I googled for it and already knew that not all svchost.exe are trojans. So how the heck can I know which one of 'em are trojans and how am I supposed to remove them?

What is svchost.exe?

This morning when I opened up my Windows Task Manager, I noticed about 8 svchost.exe running in my background. I googled for it and already ...

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