File Explorer not showing thumbnails

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  1. Posts : 10
    Windows 10
       #1

    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
      My Computer


  2. Posts : 61,510
    64-bit Windows 11 Pro for Workstations
       #2

    Hello dgo47, and welcome to Ten Forums.

    If you haven't already, you might see if clearing and resetting your thumbnail cache may help.

    Clear and Reset Thumbnail Cache in Windows 10

    If that doesn't help, then check, apply, uncheck, apply the Always show icons, never thumbnails box to see if that may refresh and toggle it again.

    Enable or Disable Thumbnail Previews in File Explorer in Windows 10
      My Computers


  3. Posts : 10
    Windows 10
    Thread Starter
       #3

    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
      My Computer


  4. Posts : 61,510
    64-bit Windows 11 Pro for Workstations
       #4

    Does this happen with all files?

    I've noticed if a folder contains a lot of images of large file size, it could overwhelm the cache causing the thumbnails not to load or not completely.
      My Computers


  5. Posts : 4,525
    Windows 11 Pro 64-bit
       #5

    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
      My Computer


  6. Posts : 10
    Windows 10
    Thread Starter
       #6

    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!
      My Computer


  7. Posts : 4,525
    Windows 11 Pro 64-bit
       #7

    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)
      My Computer


  8. Posts : 61,510
    64-bit Windows 11 Pro for Workstations
       #8

    FreeBooter said:
    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)

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


  9. Posts : 4,525
    Windows 11 Pro 64-bit
       #9

    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.
      My Computer


  10. Posts : 61,510
    64-bit Windows 11 Pro for Workstations
       #10

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

    It wouldn't hurt to also rebuild the icon cache just to rule it out, but it usually won't help with a thumbnail issue.
      My Computers


 

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