I am having windows 8.1 with update 1 installed and all release updates of windows till the date i am posting this questions. System is laptop, Core i3 with 6 GB RAM and 500GB hard disk.
When ever i restart my CPU or resume it from hibernate or sleep, "Service Host: Local system (network restricted)" process which i can see in task manager along with many other child services, is taking 100% Hard Disk.
These process makes system very slow not even at startup but sometimes, they drill the hard disk anytime they want.