Windows 10: Prefetch Question

Have a file in my prefetch I can find no info on. "dynrespri.7db" Anyone know what this associates with? Thanks.

:)

 

Excel 2013 spreadsheets open very slowly when Cortana is active

Same problem, with excel

Try going to regedit memory managment> prefetch parameters>enable prefetch select prefetch everything

then go to run MSC change superfetch to automatic

 

Delete Unused Prfetch Files

Hi,

To view the prefetch folder, kindly follow the steps below:

• Press Windows key + R
• Type in "C:/WINDOWS/Prefetch" without the quotation.

By then, you can now view the list of prefetch on your Windows. You can determine which prefetch to delete by its filename and the date that it has been modified. You can also check its properties for the details of the said prefetch files. To delete it, right-click
the said prefetch and then, click Delete.

Let us know how it goes.

 

Welcome to the forum.

The file is strictly for system use. It was never intended to be opened by an application and there is no association for the extension.

There are many such private extensions in Windows.

 

Interesting.
I never really know what the heck is Prefetch and what does it do.
Too lazy to google for it.

 

Thank you. I could find no decent info at all on google for this.

 

Yeah it confuses me too, it always struck me as one of those things not to mess with and just let Windows do its own thing. I think it has something to do with commonly used apps where parts of the file are pre loaded into RAM during boot for faster access. I guess it's pretty pointless with SSD drives and benefits stuff installed on mechanical drives. But I just leave it alone

 

The prefetch folder is used by prefetch and by Superfetch. Prefetch files (those with the pf extension) are used to optimize the load time time of applications but does nothing useful with an SSD. Superfetch loads commonly used applications before they are needed. This is all a lot more complex than it appears. Superfetch has only marginal benefits with an SSD but costs very little. There is little documentation available for any of these files.

There is much nonsense on the Internet regarding both prefetch and Superfetch. Most of what was written about prefetch in the early days of XP was wrong. Nonsense like periodically "cleaning" the contents of the folder.

 

Prefetch is still useful on SSDs, What prefetch does is monitor the loading of an application and keeps track of everything it loads, every DLL and external EXE. So instead of waiting for the application to call for those DLLs and such, it loads them into RAM when you run the application. That is Prefetch.

Superfetch on the other hand actively tries to predict what applications you run the most and preloads it in RAM before you run the application.

Both Prefetch and Superfetch are still useful even on SSDs. SSDs are not that fast compared to RAM not even close. Turning it off was nothing more then nonsense like every other bogus "Performance Tweak" for Windows out there.