Windows' File Explorer has always been one of those things that's almost great. In Windows 11, it looks cleaner, feels more modern than ever, and on a good day, it's genuinely pleasant to use. But it also comes with a long list of quirks, and one of them has been quietly annoying users for decades. Automatic Folder Type Discovery sounds smart on paper, doesn't it? It's a legacy feature dating all the way back to Windows XP that scans a folder's contents before opening it, just so Explorer can decide how that folder should look.
However, in practice, it often does more harm than good. It slows down folders packed with files, frequently guesses wrong, and then forgets its own decisions, forcing the scan to happen all over again. I'd much rather have a consistent default view and customize folders only when I need to. If File Explorer feels sluggish or unpredictable on Windows 11, here's how to disable this outdated behavior and speed things up a bit.
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Backing up your registries in the Editor
Make sure to back up your Registry Editor first
It's always fun to tinker around with stuff in the Windows Registry Editor. Whether it's to completely disable some service you don't need, or to make other root-level administrative changes, you know that the job will be done and dusted once you enter the Registry Editor.
However, it isn't completely safe, either. After all, you're making root-level changes, and a misclick here or there could do some potential damage.
Modifying your registry can cause problems with Windows. It's always recommended to export and backup your entire registry prior to making any changes.
To turn off Automatic Folder Type Discovery, hit Windows+R on your keyboard to bring up the Run dialog. Type in regedit, and hit Enter. The Windows Registry Editor will open up.
Before doing anything else, select File from the top-left, and click on Export. In the new Export Registry File window that opens up, select All at the bottom to make a backup of your entire registry. The backup size typically ranges from about 350–500 MB on many systems, so it's always safe to make a full backup. Save it someplace, and then you can proceed to tweak around.
Turning off Automatic Folder Type Discovery through the Registry
Much easier than it sounds
Now, head back into the Registry Editor, and go to HKEY_CURRENT_USER > Software > Classes > Local Settings > Software > Microsoft > Windows > Shell > Bags > AllFolders > Shell. It's much easier if you simply copy the entire file path and just paste it in the address bar inside the Registry Editor.
Computer\HKEY_CURRENT_USER\Software\Classes\Local Settings\Software\Microsoft\Windows\Shell\Bags\AllFolders\ShellInside the Shell Folder, right-click anywhere inside the blank folder on the right-hand side of the screen, and select New > String Value. A new String Value will be created here under the (Default) string value, titled 'New Value#1'. Right-click on it, and select Rename. Rename this String Value to FolderType (capitalized exactly this way).
Now that it's renamed, double-click on it to open the Edit String window, where you will type NotSpecified (again, capitalized just like this), and hit Enter. The FolderType string value should reflect 'NotSpecified' under its Data tab now. All you then need to do is reboot your PC or restart the Windows Explorer, and following this, File Explorer will no longer be doing its usual file-type sniff test before opening each folder.
To make your changes take effect, either go ahead and reboot your entire PC, or just bring up the Task Manager. Go to Processes, find Windows Explorer, right-click on it, and hit Restart. A few seconds later, File Explorer will have restarted completely, and Automatic Folder Type Discovery will be turned off.
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Automatic Folder Type Discovery sounds useful, but isn't
At least, it's not all that game-changing
On paper, Automatic Folder Type Discovery is useful. It allows File Explorer to set a suitable template for a folder as per its content. If you've got a folder full of MP3 files, it'll automatically set the view type to one that shows you the duration and Artist column, instead of the regular view template with just the file size and the date it was added. A folder full of screenshots will automatically set itself to thumbnail view when opened.
And yet, think of any folder on your PC that houses huge files or a huge number of them, and you realize where the problem begins. When it comes to folders with thousands of items, all with different file types (seriously, organize them first), Automatic Folder Type Discovery rears its uglier face.
If you want to recover the Automatic Folder Type Discovery service, simply go back to the Shell Key via the same address path, select the FolderType string value you had created, and delete it. A quick Explorer restart later, the service will be active again.
You don't want File Explorer constantly scanning each folder you open for its contents before allowing you to see them. After all, they're your files, and if you want to see them immediately, you almost always do. And yet, there's always more speed to be gained, and on the rare occasion that File Explorer takes just a second longer to display your files in a folder, you'll know that Automatic Folder Type Discovery is doing its job in the background... its useless, unnecessary job that you can turn off.
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Should you turn off Automatic Folder Type Discovery in Windows 11?
Disabling it won't magically turn File Explorer into a speed demon.
The honest answer is that it depends, but for most people who actually notice File Explorer misbehaving, the answer is probably yes. Automatic Folder Type Discovery is one of those legacy Windows features that made sense twenty years ago, when hard drives were slow, folders were simpler, and Windows needed all the help it could get guessing what you were about to open.
In 2026, it mostly just gets in the way. The constant scanning, second-guessing, and view-switching doesn't feel intelligent. Instead, it comes off as indecisive now. Worse, Windows often forgets what it decided last time, so you end up paying the performance cost over and over again for no real benefit.
Disabling Automatic Folder Type Discovery won't magically transform File Explorer into a speed demon, but it does make it more predictable. Folders open faster, views stay consistent, and you stop fighting Explorer's idea of how your files should be displayed. If you rely heavily on auto-sorted media folders or never even noticed Explorer slowing down, you can safely leave it enabled. But if you value consistency, control, and fewer unnecessary background scans, turning it off is a small tweak that quietly improves everyday use. Sometimes, the best Windows optimizations aren't flashy. Instead, they just make the OS stop trying to be clever.