Fix: Service Host: Local Service (Network Restricted) is Causing High CPU Usage / Disk Usage Some Windows users are complaining that their CPU / Disk (either or / both) usage is high, without any particular reason. The problem shows up whenever the computer wakes up from sleep, or even during regular work sometimes. If you’re facing the similar issue, you’re going to find a solution in this post. If you explore Task Manager a little bit, you’ll see that Windows’ Service Host: Local Service (Network Restricted) is causing the problem of high CPU / Disk usage. This is not relevant to CPU’s speed or power, because it can happen on any configuration. Anyway, Service Host: Local Service (Network Restricted) contains a lot of, how would I say, sub-services, and one of these sub-services is causing Service Host: Local Service (Network Restricted) to use CPU / Diskto its maximum. This service is called Superfetch and it’s used to pre-load data from hard disk into RAM memor...