Inactive Mystery audio ghosting in our computer

[Row1]

Hello - On the computer my son uses, there is some kind of program that is making audio come over the speakers. The audio is choppy, so you never hear anything clearly, except for the first couple of seconds when it starts up. After that, it is choppy. It also sounds distant. Like receiving an AM station weakly. The content is: commercials. I never hear a station identification, or a program, or music. just one of a few different commercials. As if you have one of those news site web pages that runs a little screen with commercials running all the time.

The audio level is responsive to the volume - so at least we can shut it off, but we cannot listen to videos or anything, since if we turn those up, the mystery audio also goes up.

This happens whether we open MS Explorer or not.

I cannot identify anything in the task manager - nothing seems to be using CPU time regularly, as the audio continues.

I ran Housecall online, and ran Spybot. These do not clear whatever is responsible.

I would suspect that somehow the computer was modulating radio signals, like a local radio station or a ham operator, but the constant commercial content kind of rules this out.

On this computer, we do interweb, minecraft (incl. with interweb access), goo0gle app store, a lego game, openoffice, and that is about it.

Any ideas?

 

[Broni]

You've been to this forum before so you should know the drill...

Please, complete all steps listed here: https://www.techspot.com/community/...lware-removal-preliminary-instructions.58138/
Make sure, you PASTE all logs. If some log exceeds 50,000 characters post limit, split it between couple of replies.
Attached logs won't be reviewed.

Please, observe following rules:

• Read all of my instructions very carefully. Your mistakes during cleaning process may have very serious consequences, like unbootable computer.
• If you're stuck, or you're not sure about certain step, always ask before doing anything else.
• Please refrain from running any tools, fixes or applying any changes to your computer other than those I suggest.
• Never run more than one scan at a time.
• Keep updating me regarding your computer behavior, good, or bad.
• The cleaning process, once started, has to be completed. Even if your computer appears to act better, it may still be infected. Once the computer is totally clean, I'll certainly let you know.
• If you leave the topic without explanation in the middle of a cleaning process, you may not be eligible to receive any more help in malware removal forum.
• I close my topics if you have not replied in 5 days. If you need more time, simply let me know. If I closed your topic and you need it to be reopened, simply PM me.

 

[Row1]

OK - I won't be able to begin until possibly this afternoon, but more likely this evening.

 

[Broni]