Let the kids play Minecraft and think that's what opened the system up to something (that's just an educated guess - I'm far from an expert in this area).
Running windows 7 on a basic HP desktop, with the typical MS office software. System became unresponsive and needed to power-off to shut down. After it re-started the first time it became unresponsive within about 15 minutes so shut down again and powered of the wireless router. No problems until I turned the router back on -
First thing I noticed was radio playing through the speakers - to my knowledge, no one ever set this up. I went into task manager and noticed a system process that was consuming a large amount of resources and growing. I took a shot and ended the process. At that point, the radio station stopped playing and the system seemed fine.
Within about 5 minutes, the radio started up again and the suspect system process showed up again in task manager. I tried to end the process again. At that point, the system became unresponsive and had to be powered down. Repeated this set of steps with the same results.
Tried to download an update to the MS vulnerability software, but the system didn't stay operational long enough to complete the download.
Open to suggestions -