Loud "Emergency Broadcast" or Klaxon type alert/alarm at random times

[DocFrosty]

Over the last week, at random times, I will hear two very loud alarm sounds. These sounds are similar to a klaxon, or the US Emergency Broadcast system.

CPU/GPU are not running hot (usually between 40 and 50C and google says 80C is the threshold)
I've updated drivers for every sound related thing I can think of.
Uninstalled drivers for hardware I don't have any more.
Ran autorun and un-checked or deleted any highlighted drivers.
Tried to turn on Memory Integrity but there's some incompatible drivers from an old ZTE phone that I can't seem to find a way to delete - no need to update them.

Can happen once a day to 4 times a day.

Any ideas?

[Prométhée]

Hello

[start]This is an automatic response
in order to avoid writing the same thing each time

Some elements may therefore not apply to you 
To be able to answer you effectively, we need some information

we need the exact model of your computer, and the product number
To find it follow this
for a desktop computer

HP Desktop PCs - How Do I Find My Model Number or Product Number? | HP® Customer Support
and for a laptop
HP Notebook PCs - How Do I Find My Product Name or Number? | HP® Customer Support

Give the full name with the product number P / N

this is not a model:
HP Desktop M01-F1xxx
the requested product number must look like this
Product Number: 9EE50AA # ABA
the model corresponding to this number will therefore be
HP Desktop - M01-F1033wb

Give the full version of windows

for windows 10 type winver in the search box
if you give the best information
your problem could have a solution more quickly (depending on the difficulty, of course)
Learn how to use the Community

Advice for asking the "Very Best Question"

First-Time-Here-Learn-How-to-Post-and-More

is it something like that ?

HP Desktop PCs - Computer Does Not Start and Emits an LED or Beep Code | HP® Customer Support

[DocFrosty]

Product number: 4NN77AA#ABA

Serial number: [Personal Information Removed]
Version 10.0.22621 Build 22621

Other information: Both fans are running. 
If I shut down, this seems to stop the alarm for a day. 

[Prométhée]

---

@Prométhée wrote:

is it something like that ?

HP Desktop PCs - Computer Does Not Start and Emits an LED or Beep Code | HP® Customer Support

---

[DocFrosty]

I don't think so. It starts fine, and it isn't the beep-beep kind of chime. And there's no other pop up or notification I can find that tells me what tripped this. I disabled hibernation mode, thinking that might be a trigger, but that didn't stop it.

I thought maybe it was an alert if my external backup failed, so I took that out, but the sound happened after that. I tried using different USB ports thinking it might be some manner of bad port or failure there. Didn't stop it.

Instead of a beep-beep, this is like bwwaaaaa... bwaaaaa
Similar to this sound but just two bursts:
https://www.youtube.com/watch?v=W_9KR3mYkUo&t=3s

[Prométhée]

????
at least try to record the real sound of this computer

[DocFrosty]

Finally I was able to catch this sound. 

aaaaand I don't see anything that let's me insert a sound file into the reply.

[Prométhée]

No, you have to use a sharing site, or via youtube video

[DocFrosty]

Ah ok. Thank you.

Let's see if this works. The website says the link is good for 7 days.

You should hear some typing and music in the background. Then at the last 2 seconds the alarm sound I am getting.

https://www.transfernow.net/dl/20230101DodbFklQ

[Prométhée]

curious, I can't quite distinguish, but the computer works during this time?