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I found a simple solution for keeping ccSvcHst.exe from hogging my system which has Norton 360 which I like and trust.
* Go to Tasks, Check Norton Tasks.
* Look at the Silent Mode bar. You will probably find Silent Mode turned Off even if you configured it to be On. Click on Silent Mode, and turn it on manually for the desired number of hours. In a few minutes, this stops the renegade Norton background tasks that I cannot control any other way once they take over.
* Look at the graphical analysis of hour by hour consumption of CPU at the top of the Check Norton Tasks window. If your machine has been hijacked by ccSevHst.exe, you will find that Norton (in the yellow band) has taken more than 30% of your machine. Click on a particular time slice, and you will find several instances of ccSvcHst.exe that each have been taking something like 20% of your machine.
* Now close _all_ Norton interactive screens and windows, including the nonsense warning screens from the Norton program.
* Check in Windows Task Manager, sorted by Image Name. You will find a few sessions of ccSvcHst.exe that are at Zero CPU usage if you successfully have 1) activated manually the Silent Mode and have 2) closed all screens and messages opened by the Norton program.
* If you Disable Antivirus Auto-Protect, the several sessions of ccSvcHst.exe do not reduce their activity. So Disabling Antivirus Auto-Protect does not assist in controlling ccSvcHst.exe hogging your system.
* Now, if you open the Norton Tasks, Check Norton Tasks screen, you can see (from the yellow area graph near zero CPU usage) that Norton processes have used nearly zero CPU for the time that the Norton screens were closed. However, as you can see, as soon as you opened the Norton screens, ccSvcHst.exe has hogged around 30% of your machine.
* Summary of solution to keep ccSvcHst.exe from hogging your machine. 1) Turn on Silent Mode manually in the Check Norton Tasks screen and 2) Close _all_ Norton screens, advertisements, pop-ups, and dumb warning panels.