Hey guys,: I have a highly annoying problem with my freshly installed Windows 7 Home Premium and I hope, someone here can help me. The Desktop and the Windows Explorer seem to switch focus all the time. If I klick on the Desktop, an explorer window will start to flash constantly. If I try to manipulate a file (drag it, rename it) I have to be extremely quick, because the desktop or the explorer will lose focus and reset my effort. I tried to record whats happening and uploaded the video here: I already tried to eliminate all running processes that I could identify to look for the source of this. Shortly I thought my USB mouse would generate the problem, because it stopped after I unplugged it. But today that doesn't help anymore. Even uninstalling it doesn't change it. My Windows version is a couple of days old, I don't understand what I could have done I have run out of ideas. Can you help me?