I'm using Windows 10. 

I recently installed [IrfanView 64-bit](https://www.irfanview.com/), and also cleared my thumbnail cache with [CCleaner](https://www.ccleaner.com/).

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### Problem

Now random `jpg` and `png` images have thumbnails and many do not, they are stuck with the IrfanView icon. Video, such as `mp4`, thumbnails are also missing.

[![irfanview icon](https://i.stack.imgur.com/XPgys.png)](https://i.stack.imgur.com/XPgys.png)

Sometimes it shows white icons and my View pane is disabled.

[![white icon](https://i.stack.imgur.com/kOHw0.png)](https://i.stack.imgur.com/kOHw0.png)

[![view pane](https://i.stack.imgur.com/EDhAz.png)](https://i.stack.imgur.com/EDhAz.png)

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In folders, Explorer shows a green loading bar that never finishes.

[![loading](https://i.stack.imgur.com/7JE33.png)](https://i.stack.imgur.com/7JE33.png)

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Right clicking on an image with a thumbnail will pop up the context menu, but right clicking on images without thumbnails freezes Explorer.

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The Settings Menu also constantly freezes when clicking on items.

[![settings](https://i.stack.imgur.com/XblO5.png)](https://i.imgur.com/BpdEori.png)

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### Fix Attempts

1. Tried uninstalling IrfanView and using the default Windows Photos app, but then no thumbnails will appear, and opening an image only freezes Explorer. Right clicking on any image also freezes Explorer.
2. It tried clearing and rebuilding the cache with Disk Cleanup and CMD.  

<https://www.windowscentral.com/how-reset-thumbnail-cache-windows-10>
3. Tried using this icon rebuilder and restarting the computer.  

<https://www.thewindowsclub.com/icon-cache-rebuilder-for-windows-10>
4. Ran `chkdsk` and `sfc /scannow`, it fixed a corrupted `mscormmc.dll` but did not solve the problem.
5. Restored old CCleaner registry backup.
6. Ran a virus scan with Eset which came up clean.
7. Checked the health status of my SDD which says no problems.

Nothing has fixed the issue.