Hello
Do you clear all the icon caches in the following two paths?
%userprofile%\AppData\Local
C:\Users\John McNally\AppData\Local\Microsoft\Windows\Explorer\iconcache*
To verify whether the issue is related to the specific account, we could try to login with another account or login with a new account then check the issue.
If the issue occurred with the new account, we may consider to check the system health with administrator then run "DISM /Online /Cleanup-Image /RestoreHealth" or "sfc /scannow".
Best Regards,
Wesley Li
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