I recently had to install Skype having been ordered to by MSN. However whenever I run it the Skype window is the only part that remains usable. Taking the cursor outside of this window I just get the spinning circle, and moving down to the Taskbar it changes back to an arrow but clicking on any icon or the Start button brings no response. As I say, Skype remains usable.
I have un-installed and re-installed.
(The only way out is Ctrl+Alt+Del then Log Off)