Recently I have had a problem of the Windows 7 desktop icons being unresponsive to the mouse pointer. They don't highlight when the pointer hovers over them, and they don't respond to any mouse buttons. This problem occurs with a wireless AND a wired USB Mouse. It is only the desktop icons, the icons in the quick response tray function normally. Rebooting the system restores the icons to normal operation, but the problem returns a few days later. Has anyone else seen this problem? Is it likely to be a Windows 7 problem? This is a recent problem, the system has been OK for over a year.