Hello, I’m Virginia a fellow Windows user.
Have you ever used any Windows modification program which may have caused the problem?
When did you last see the icon in the taskbar?
Please try these cmds:
Right click on start & choose powershell/terminal with admin & type/copy & paste these cmds one at a time then click Enter:
SFC /SCANNOW
DISM /Online /Cleanup-Image /StartComponentCleanup
DISM /Online /Cleanup-Image /RestoreHealth
SFC /SCANNOW
Yes the Sfc cmd is run twice.