Microsoft has a powertool called Process Explorer that you can use as a replacement for Task Manager. If you google Process Explorer, it’ll be the link that goes to Microsoft’s TechNet site.
When you use it, it’ll show your processes in a tiered format with the Process IDs and any child processes will be branched below it. If you hover over the svchost process that’s eating RAM and CPU, it’ll pop up a list of services that particular svchost process controls.
From there, you can narrow down what services may be giving you issues and AFTER researching those services, you can either disable them if the service is not critical or restart the service if it’s acting up in the Services management tool under the Control Panel.