File Explorer not showing thumbnails

My file explorer is not displaying thumbnails ( as it was earlier) instead it is showing default program icon ( windows photo viewer, set as default for all pictures) for all picture files like jpgs, bmps.
When I browse folders containing pictures. at first it displays thumbnails ( as it should ) and then immediately all thumbnails change to default icon.
When I double click any icon, it opens in its associated program correctly.

I have tried and checked all things commonly being referred when I have Googled my problem. .
I have checked all the common places like organize folder -> view -> 'always show icons never thumbnails' is unchecked
I have checked group policy settings.

Grateful if someone could point me in the correct direction to rectify this problem!

Many thanks,

dgo47

Brink,

Many thanks for you reply. I have done all the steps you suggested, but no change,

When I open a folder containing photos, some open correctly but the vast majority open with thumbnails, but they very quickly get overwritten and you can not longer see the thumbnails.

Are there any more suggestions?

dgo47

You can prevent Windows 10 from deleting thumbnail cache by executing below commands from Command Prompt. Make sure to open the command prompt as a administrator.

Code:

Reg.exe add "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\VolumeCaches\Thumbnail Cache" /v "Autorun" /t REG_DWORD /d "0" /f

Reg.exe add "HKLM\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\VolumeCaches\Thumbnail Cache" /v "Autorun" /t REG_DWORD /d "0" /f

Brink,

Most of my thumbnails are not shwoing.

I have seen one possible solution which is to rate each photo (using the rating system in Properties) but since I have nearly 300 GB of photos this is too laborious! However, it does work!

Change the thumbnail cache size to 8MB with this batch script.

Code:

:: Change Icon Cache Size in Windows 7, Windows 8, and Windows 10.

@Echo Off & Cls 


net sess>nul 2>&1||(powershell start cmd -ArgumentList """/c %~0""" -verb Runas & exit)

Cls & Mode CON  LINES=11 COLS=60 & Color 0E & Title Created By FreeBooter
Echo.
Echo.
Echo.
Echo.
Echo          Change Icon Cache Size to 8 MB (Y/N)?   
Echo.       
Echo.
Echo.


Set /p input= RESPONSE: 

If /i  Not %input%==Y (Goto :_Ex) Else (Goto :_Start) 

:_Ex
If /i Not %input%==N  (Goto :EOF) Else (Goto :_RegRestore)



:_Start

Reg.exe add "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer" /v "Max Cached Icons" /t REG_SZ /d "*8192‬" /f >Nul



Cls & Mode CON  LINES=11 COLS=50 & Color 0E & Title Created By FreeBooter
Echo.
Echo.
Echo.
Echo.
Echo            Increasing Icon Cache Size
Echo.
Echo.
Echo. 
Ping -n 6 localhost >Nul

CHOICE /C YN /M "Press Y to Reboot, N for exiting script."


If %errorlevel% == 1 ( Shutdown /r /t 0) Else (Exit)


:_RegRestore

Reg.exe delete "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer" /v "Max Cached Icons" /f >Nul



Cls & Mode CON  LINES=11 COLS=50 & Color 0E & Title Created By FreeBooter
Echo.
Echo.
Echo.
Echo.
Echo          Restoring Default Icon Cache Size  
Echo.
Echo.
Echo. 
Ping -n 6 localhost >Nul

CHOICE /C YN /M "Press Y to Reboot, N for exiting script."


If %errorlevel% == 1 ( Shutdown /r /t 0) Else (Exit)

Brink said:

Unfortunately, that would be for the icon cache instead of thumbnail cache. The thumbnail cache automatically increases as needed though.

My bad i thought it will also help with thumbnail cache size.