Looks like the problem is between Chrome and svchost... see if disabling Chrome's extensions/addons, and if there's no differrence, remove and reinstalling Chrome without extensions at least initially to see the difference if any. You can also check the BIOS Power Saving options to make sure the CPU runs at 1650 Mhz.. as you can see in the image you posted your CPU is/or was running underclocked due to Power saving options,.. if a HWiNFO sensor scan still shows it running low, disable the BIOS power saving settings for CPU speed management.
For the svchost issue;
1. run a rootkit scan
2. And disable a few unnecessary Windows services following guides like those you can find in the following pages... you can search for other guides to stop more sevices safely, but some I usually disable are the Remote desktop service and those related, the Computer Browser, the Server service... other services such as Telephony, Parental control (in no children use your computer), Terminal Services, Windows Defender service, Encryption service, are examples of services you may not need and can safely disable. As rule of thumb, click on the service's Dependencies tab and if no other service or unimportant services depend on it, it can safely be disabled.
To acces Windows Services:
Start > Search for "Services.msc".
Abnormally high CPU usage from svchost.exe
http://answers.microsoft.com/en-us/windows/forum/windows_7-performance/abnormally-high-cpu-usage-from-svchostexe-solved/eb38d25d-6bb2-47cd-80f2-5389c62337be?auth=1
10+ Windows 7 services you may not need
http://www.techrepublic.com/blog/10-things/10-plus-windows-7-services-you-may-not-need/