You may be wondering what a .pf file extension format is. PF stands for Prefetch, which helps in loading apps faster the next time you open it.
Whenever you launch an application for the first time, Windows creates a prefetch file containing the files loaded in the app, creating an index of the app location in your PC. So, whenever you run the app again, it uses the index to speed up loading.

What happens when you delete a PF file? Fortunately, there is no harm in removing a PF file on your Windows 10 or 11 system. Windows will simply load the app at its usual pace like the first time if you run it again without the PF file. It will also create a new PF file, which will be the new index to reduce loading time in the future.
However, some users prefer to delete the files to help free up storage space on their C drive.
How to View and Run .pf File Formats on Windows 10 or 11 PC?
PF files are located in the C drive within the Prefetch folder. You can easily go to this path when you want to access the file: C:\Windows\Prefetch.
Keep in mind that you need to have administrative rights when opening Prefetch files. Make sure to sign in with your administrator account or change ownership settings to full control.