dasHost.exe is causing udp broadcast flood on 22222 or 10004 ports...

Possible Solution

Just wanted to give an update on our situation.

We had the same issues, whenever a user would print out of photo viewer, OneNote, and snip tool in windows 11, the storm would start.

Neither of the updates above solved the issue.  KB5060842 nor KB5063060

However, there was an update released on Jun 26th that has fixed the issue. Although its not specifically called out in the release notes, all the computers that we have installed it on have stopped doing this.

KB5060829 https://support.microsoft.com/en-us/topic/june-26-2025-kb5060829-os-build-26100-4484-preview-e31ba7c2-ff65-4863-a462-a66e30840b1a seems to be the answer for us. Hope it helps the rest of you!

We were able to receive the update via normal Windows Updates. Didn't need to have the option to receive updates as soon as available set either.

The "Add device" blue option will be greyed out in the GUI interface, but I can still add a printer using the manufacturer's installation tool by inputting the target printer’s IP address or network scanning.

The key may be controlled within the Settings Explorer only.

I will try deploying this key to more machines tomorrow to observe the outcome.

Hey, thanks for the information. When you set this registry key, does it completely block the ability to add new printers?

Today, I had accessed 3 machines, two are new installed within half year and 1 are old machine. The printing driver are not updated recently.

In Microsoft Photos, opening the print dialog each time generates a new dashost.exe process (as shown in the figure).

Only the method mentioned by above member can solve the issue.

[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer] "NoAddPrinter"=dword:00000001

My workplace has up to 400 computers. And the flooding issue is mainly on several user computer.

We had applied the registry patch for Software\Microsoft\Print\UnifiedPrintDialog = 1 and disable the fast startup, but seems some computers (under 10 PCs) are still suffer (5000 UPD broadcast per day).