1. run "regedit"; 2. goto [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management\PrefetchParameters\EnablePrefetcher]; 3. Set the value to either 0-Disable, 1-App launch prefetch, 2-Boot Prefetch, 3-Both ("3" is recommended). 4. reboot.
It should decrease the boot time and the time it takes to load programs.
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It should be noted that this is the default setting. But it is still worth checking as many tweaking applications will change this, usually without properly informing the user. Larry Miller, Microsoft MCSA