To reiterate, we don’t recommend disabling Superfetch except as a troubleshooting measure for the potential issues mentioned above. Most users should keep Superfetch enabled because it does help with overall performance. If you aren’t sure, try turning it off. If you don’t notice any improvements, turn it back on.

Is turning off Superfetch safe?

If you’re using an SSD, Superfetch is perfectly safe to disable. Adds virtually no added benefit speed wise, and contributes to wear and tear on the SSD.

When should I disable Superfetch?

Scroll down until you see the entry “Service Host: SysMain.” This is Superfetch. If your Task Manager shows Superfetch consuming a lot of resources (dozens of MB/sec or high CPU usage) for a sustained period, you should disable it.