Beeping

some users reported two beeps are from the gadgets sidebar, especially the Network Meter gadget.  Try change the settings in Network Meter for an alert that doesn't beep

@redxps630​ I have no gadgets sidebar, and found nothing about Network  Meter sound. Timing time apart. 33sec, 42sec, 2minutes, 2minutes, 2minutes,…

Is this PC new or used? 

What version of BIOS is installed (latest is 1.21.0) ?

How old is motherboard battery?

Does "while idle" mean while PC is sleeping or hibernating?

Try a clean Windows 10 install.

@RoHe​ it is new, but was setting unused for a couple years. Yes, only beeps when sleeping/hibernating.

@RoHe​ Update my BIOS and put in a new battery. Turned all Windows sounds off.

My Inspiron 3671 beeps twice every 2 minutes when setting idle only.

If I put it in Airplane mode or turn off the WiFi it doesn’t do it.

I shouldn’t have to turn off anything.

And my Inspiron 3847 doesn’t do it.

Please don't start a duplicate thread about the exact same issue...

Did you install all the latest Windows Updates?

What is "airplane mode" on a desktop PC?

Might be a Power plan settings issue:

Reboot PC and open Device Manager. Expand list under USB. Double-click each USB entry and click its Power Management tab, if it has one. Uncheck the box "Allow PC to turn off...". Repeat for all USB entries.

Then expand list under Human Interface Devices in Device Manager and uncheck that same box for any HID entry that has a Power Management tab. Exit Device Manager when done.

Next, open the Windows Advanced Power Settings screen. How you get there depends on whether using Win 10 or Win 11. On that Advanced screen, disable Hibernation, Hybrid Sleep, USB Selective Suspend, and PCI Express Link State Management.  On that same screen, set Wireless Performance to Max Performance. Save the changes to the Power plan and reboot. 

Re-enable all the Windows sounds you need and see if PC beeps when it's sleeping now...

@RoHe​ I changed items under Change System Sounds to different sounds to track it down. Found that the Beeps were coming from “Device Disconnect” Changed that one item to (none) and no more annoying beep.

Not sure what Device is disconnecting but probably doesn’t matter.

So is this the USB device disconnect sound, or something else? 

Since it doesn't beep when WiFi is off, it's could be the WiFi card that's being disconnected.

So changing the Advanced power plan settings as I indicated above, especially disabling PCI Express Link State Management and setting Wireless to max performance might stop the beeps, when the device disconnect sound is enabled.  And if this actually is the USB disconnect sound, you probably should have that enabled....