I compressed the files on my System drive to gain some space, and now my folders icon looks like this in the taskbar:
I KNOW there is a very easy way to set this icon back to normal, since it already happened to me once a while ago, but I can't remember what it was...?!
[EDIT] Deleting the IconCache.db file solved the issue:
- Open Windows Explorer, and configure your Folder Options > Views to show Hidden / System Files
- Go to C:\Users\\AppData\Local folder
- Delete the hidden IconCache.db file
I knew it was easy!