Where Is the Windows Prefetch Folder?
Windows Prefetch .pf files that speed app launches, and why clearing them slows the PC down.
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Windows tracks app launches as .pf files in C:\Windows\Prefetch to preload what you open often. Forensics analysts love them because each file records run counts and last run times.
Leave this folder alone. Deleting it forces Windows to relearn every launch pattern, which slows boot and app starts for days.
Where Windows stores this, by platform
C:\Windows\Prefetch
Needs admin to browse. layout.ini plus per app .pf files. Superfetch/SysMain uses this data; disabling the service orphans the folder.
Frequently asked questions
Will deleting Prefetch speed up my PC?
No, the opposite. Those files are the speedup. Windows rebuilds them over days of slower launches.
How do I see when a program last ran?
Check its .pf file timestamp and embedded run count with a prefetch parser. File names encode the exe plus a hash.
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