There is a problem with Windows 7 x64, and I am desperate to solve it.
Periodically during the downtime of the computer is turned on or during operation, i.e. without any regularity, stops responding on pressing the keyboard and mouse. When this software works, nothing freezes, the mouse moves. Meaning you cannot click any buttons, nothing to gain. As it turned out it to be treated using ctrl-alt-del and just go back. In promising the impression that on top of the desktop appears an invisible app.
Hundreds of hours gugleniya answer was given. I assume it starts some process, service, or something else on top of all Windows and accordingly does not give anything to press. Already AntiVir was uninstalled, turned off various services.
Please if you have the type of advice reinstall Windows somehow substantiate it.