This should be a simple problem to solve, yet after 5 hours I can't seem to figure out what's going on. I have just upgraded my OS to Windows 7 Ultimate 64-bit and everything was fine when it was installed. But since yesterday, the system tray icons (volume, internet connection etc) do not appear at the down-right corner of the screen. I have resetted the registry according to the official instructions by Microsoft and nothing happened. I still can't see the icons. However, eveything works fine. I have sound (which I can adjust through the control panel) and I can connect to the internet or check my antivirus program. I have also installed a Custopack theme for Windows but I doubt that has to do something. I have installed the same theme on another Win7 machine with no problems at all. Does anyone know how to fix this?