Hello
It seems you are experiencing an issue with taskbar icons disappearing on your Windows system. This can be frustrating, but there are several steps you can take to resolve the problem.
Clear the Thumbnail cache using commands from an elevated prompt:
DEL /A /Q "%localappdata%\IconCache.db"
DEL /A /F /Q "%localappdata%\Microsoft\Windows\Explorer\iconcache*"
Run the System File Checker (sfc /scannow) from an elevated prompt.
Use Deployment Image Servicing and Management (DISM) commands:
DISM /Online /Cleanup-Image /CheckHealth
DISM /Online /Cleanup-Image /ScanHealth
DISM /Online /Cleanup-Image /RestoreHealth