Hi Today I use Alt+Tab as usual but found a window called "UNCServer". Wired thing is, it is invisible. Absolutely nothing happens when I try to select it. Anybody has any idea what it is and how to get rid of it? It is terribly annoying to have a not-existing window hanging around when I try to switch between windows It is the second time I see this thing. Rebooting could make it disappear but that is not cool and it just comes back today. Thanks. Edit: OS is Windows 7 SP1 Ultimate 64-bit.