I'll add more info. Ninety %+ of my icons disappeared. All the start menu icons but one, the taskbar right now seems OK, one might be missing , lower right all but 2 missing should be at least 5. I have no back button. The forward button is colorless. All the others are missing - stop, refresh etc. The search and favoriates words are there, no button outline.
If you put the curser on the area the drop down explanation appears and the function remains OK.
Just no icons.
I tried "restore" and they returned.
I restarted all was fine.
I went into hibernation and came out of it with no icons.