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Superfetch is an option in Windows which pre-loads commonly used application components into memory in order to reduce load times. Applications such as Excel will open more quickly with Superfetch enabled. Prefetching is the process of storing information about applications to help them open faster. Superfetch predicts which applications will be launched and loads the necessary data ahead of time.
Follow these steps:
1. Open the Registry Editor (command: regedit).
2. Browse to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management\PrefetchParameters.
3. Right click on 'EnableSuperfetch' and select 'Modify'.
4. Entering a value of 1 will enable prefetching when applications are launched. A value of 2 will enable boot prefetching, or a monitoring of which files are accessed when the operating system is started. A setting of 3 enables both kinds of pretching, and a value of 0 disables them both.