It's normal, and that process is responsible for a number of key Windows services.
Now it's your turn. Why haven't you installed SP3? The only valid excuse is that you're a security researcher and this is a ******** system. Somehow, I don't think that's very likely.
WHen my system slows, I check TaskMgr.
The main thing i notice, is that there are 6 or 7 seven tasks named svchost.exe .
Is this normal?
What does svchost.exe do?