SOLVED Dial-up error 633 w/build 15063 Pro

[borate]

Dial up worked fine in 1607. With the update to Creators' build it now reports "error 633 - com port in use."

The modem has always been on COM 3. Tried ports 5, 9, 11. Same. COM 1, the only port listed in Device Manager, is shown as "in use." Process Explorer lists it as...

Non-existent process
PID 2956
Type: Mutant
Name: \sessions\1basenamedobjects\notification serializer Mutex

Searched, read and tested virtually every suggested fix...

Uninstalled and reinstalled dial-up connection
Uninstalled modem (in Safe Mode), booted normally and updated modem driver
Created a "reservedport" registry entry for port 1723
Ran netstat -aon search for port 1723; it's not listed
Disabled the broadband adapter temporarily and turned off the broadband modem temporarily
SFC /scannow shows no errors
There are no VPN connections on this PC

Wide open to new thoughts on restoring dial-up capability...

 

[borate]

ADDED INFO...

When 1511 O/S was updated to 1607 DUN continued to work fine. Some months later, the 633 error appeared. An earlier 1607 image was restored and DUN was again functional.

Applied Creators' update to that earlier 1607 restore and over a 1511 restore. DUN had been functional on them all until this update broke it. Have others had the same experience? Is there a fix?

 

[borate]

UPDATE
As of 4/11/17 cumulative update to build 15063-138, DUN remains non-functional.

 

[borate]

A 4/12/17 phone discussion with MS pegs this as a manufacturer's driver issue, not under Microsoft's control. Precisely whose or which driver is unknown.

 

[virekk]

Hi everyone the solution for error 633 after update is simple for modem Huwaei is to download mobile partner app for windows and install app In Dashboard - Settings-Options and Changes the Connection Type from RAS to NDIS. but you must do something else to work modem is the only way to work

press the logo of Windows in a taskbar and search Settings- network& internet- cellular and you gonna see your device usb you need add apn profile to work huwaei modem click advanced option ( probably that method gonna work with other devices) its very important to add in this section in windows because if you have set apn in your aplicaction internet does not work only you must set apn in windows and then save profile and now you can use app mobile partner for connect or disconnect device with any problems(allow windows to take control with this conection Creators Update option) to use a mobile partner app

to set apn in in many cases is to set no password no username

in Apn type set :internet (depends of your operator)

and done

probably this method also work without application mobile partner to change connection type try do only set apn in windows

 

[borate]

Issue has been resolved in Creators' version (1703). See this thread.