Hi mampytanie666,
Welcome to SevenForums!
Try this . . .
[1] Click Start => Computer => Users => Your user => AppData => Local => delete the IconCache.
[2] Right-click the taskbar and select Task Manager => Processes tab => right-click explorer.exe => End Process.
[3] Right-click the taskbar and select Task Manager => select File => New Task [Run...], type explorer.exe => OK.
I hope this helps!