# Restore thumbnails in Windows File Explorer?

I remember Blender use to produce thumbnails in file explorer. I'm not sure what happened, but I've recently reformatted windows and installed 2.76b, and it still doesn't show them. I assume this isn't something on my end, and I found this thread which makes it seem as if there is something wrong with the installer:

https://developer.blender.org/T45389

My question is: is there anyway to manually fix it?

• The *.blend files open no problem, they just don't show a thumbnail of the scene. Instead it's the blender logo. Dec 19 '15 at 20:33
• maybe related ? blender.stackexchange.com/questions/23269/…
– user1853
Dec 19 '15 at 21:50

This appears to be a bug in the Blender installer, but the fix is fairly simple.

Open the Windows icon in the bottom left corner of your computer display and search for "command prompt"

Right click on the result and select "run as administrator."

There will be a small window with a black background and a blinking cursor.

Type "chdir c:\program files\blender foundation\blender" and press Enter (chdir is the command for changing directories with the command prompt)

You should now be at that directory.

Type "blender -R" and press enter. You should receive a message indicating that the registration has been successful.

Close any Windows Explorer windows and then open Windows Explorer again.

Navigate to a directory that has your blend files and you should now see thumbnails for all of your blend files. If there some blend files that don't have thumbnails, it's probably an old file before the thumbnails were added. Just open and save it again and you should see the thumbnail.

I'm not sure why Blender Foundation hasn't fixed this instalation problem by now. I'm wondering if you have to install blender as an administrator to get it to regiser the thumbnail dll.

Anyway, until it gets fixed, you will likely have to register as described above with every new installation.

If all else failed. Try this.

Download an older version of blender installer. I used version 2.66a from their previous versions archive. Since it's only 300MB I keep the 2.66a version on my harddisk. After installation of the older version your thumbnails should start working again.

Cheers.

It seems that there's an error in 2.79b version (on Win 10 1809) on registering shell extension. I ran "blender -R" command and it was successful, but no thumbnails appeared on .blend files. I searched the registry and found that the corresponding key written in .blend —> ShellEx —> {e357fccd-a995-4576-b01f-234630154e96} subkey (on my system it is {D45F043D-F17F-4e8a-8435-70971D9FA46D}) is only present in HKEY_CURRENT_USER\Software\Classes\CLSID. So I copied that key to HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID also. And the thumbnails appeared (no need to restart Windows Explorer or rebuild the icon cache, just F5).

• This worked for me where the first answer didn't do anything! Jan 7 '20 at 18:23

KoolMode's answer was my savior until I installed Windows 10 from Windows 7. Now (after navigating the explanation and registry) danissimo's answer is my savior.

I manually retyped the data in the Registry Editor but I exported it for your convenience.
Copy Paste this text into notepad or whatever and save it as [filename].reg, then open/run it.
Or run regedit.exe then go to File > Import > Find your file

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{D45F043D-F17F-4e8a-8435-70971D9FA46D}]
@="Blender Thumbnail Handler"

[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{D45F043D-F17F-4e8a-8435-70971D9FA46D}\InProcServer32]
@="C:\\Program Files\\Blender Foundation\\Blender\\BlendThumb.dll"

Only thing I found works, is copying an older BlendThumb.dll from Blender 2.81 and place it in 2.93 folder and run blender.exe -r again. See https://developer.blender.org/T84599