What is Windows Prefetch File?

Have you ever heard of Windows Prefetch File? Windows Prefetch Files are used to optimize application loading and Windows boot up. In Windows XP, the main component is called Prefetcher and in Windows Vista, there are 2 major components that are working together to increase the prefetch ability which is Ready Boots and Super Fetch.

Prefetch files are used to monitor and adapt the usage pattern of files and applications over period of time and to load the majority of the files and data needed into memory so that they can be accessed directly and very quickly when needed instead of searching them from the hard disk making it slower due to seek and spin time of the hard disk.


The picture above should show you the location of the prefetch file. There’s also a rumor that if you delete the files in the prefetch folder, it will make your computer loads faster. Well, eventually this is against the principle of prefetch file in the first place. Deleting the files in the prefetch folder will make your computer takes a longer time to boot.

Prefetch files can be identified as files with extension *.pf or File Extension OPF. Remember, these type of files are meant to increase the speed of application loading and deleting the files will make your program to load longer.

  • delete it with ccleaner software, it’s easy way to handle all this file

  • That’s the manual way. The automatic way is to use CCleanr

    But you know me , I don’t bother to mess with those stuff. I am against those rumours anyway , that says that it would make things slower

    Its there to speed things up. Its just like how Vista sucks up RAM so much. This is in order to make applications load faster but then it was a nice concept (OSX used it and does it well and Linux does it well). I think they fixed it in Windows 7 already

    Cheers and uh yeah you got a reader

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  • weh. belog ko konsep haru biru ke skang?

  • hm.. i see.

    i just know about this prefetch thing anyway. i’ll explore a little bit later. thanks for sharing, bro 😛

    alone’s last blog post..Between Dreams & Reality

  • no comment 😐

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  • over a period of time, your pc usage changes, so it’s better to clear all the prefetch.