Computer will run for a while then all of the sudden the screen will go black and will have a small white box with multiple colored lines going vertically through the box. I ran a full systems hardware check and all hardware passed the test. I went to even viewer and the only error it showed was error 7022. "The HP CUE DeviceDiscovery Service service hung on starting." that is what the error says. It seems to me it only does this when the fan is not getting all the air it needs. It is running windows vista. Any ideas on what exactly causes this and how to fix it?