Ridley 295 Posted January 5, 2020 As requested here WeeThumbnail.dll is part of the WeeTools and allows Windows to preview a .spr file. Original Author is Shinryo @rAthena In order to make it work in Windows 10 you need to register the .dll Download x86 or x64 based on your OS Copy the .dll to your windows/system32 folder Click the Windows/Start button in the lower left corner Type CMD - then right click it and select "Run as Administrator" Note: If you run it through Win+R you need to confirm with Ctrl+Shift+Enter to run it as administrator Now in CMD Run the following command regsvr32 "C:\Windows\System32\WeeThumbnail.dll" This is how it should look like: Afterwards a PopUp from RegSvr32 appears, saying the .dll was installed successfully. Now Restart your system and Windows should preview .spr files Troubleshooting: Error 0x80070005 means you didn't run CMD as admin. 1 1 Tio Akima and juniorbocask8 reacted to this Quote Share this post Link to post Share on other sites