Parallel and serial ports not working in Windows 10 (Version 1511)

Hi

Since the 1511 update myself and my customers have problems with devices connected to COMx and LPTx ports. After a search I found a solution by disabling the ports and then re-enabling them and a script to run at boot time to automated the process.

As we have more than a 100 customers involved in this and we can not turn off the Windows updates, this is its creating chaos in our support department.  

The question is: Is there a patch available for this and if not when can we expect it?

Kind regards

Cornie van Schoor

InfoStar Software

 

Question Info


Last updated December 5, 2019 Views 5,426 Applies to:

Hello,

I believe the below article should help:

How to: Install and Update drivers in Windows 10

(If I understood rightly)

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Hi 

The issue is not that the drivers are not installed, in most cases these are "standard" on board serial and parallel ports with windows build-in drivers.

The issue is that since the 1511 update, if for example a printer is connected to the ports and you try to print, it immediately goes in an error state.  (If you disable the port and then re-enable it, it works fine!)

Its definitely a bug in Win10 release 1511 with either the drivers or the way it access the drivers.

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Hello,

 

Sorry for the delay in response.

 

Let us run SFC scan and see if it brings any difference.

The sfc /scannow (System File Checker) command scans all protected system files, and replaces incorrect versions with correct Microsoft versions.

 

1. Press Windows + X keys.

2. Click on Command Prompt (Admin) to bring up an elevated command prompt.

                 Note: Click Yes if it prompts for permission.

3. In the command prompt type in the following command and then press Enter.

                                 sfc /scannow

Note: Some files saved on your computer might get deleted when fixing corrupted files.

 

Kindly let us know if you have any further query on Windows, we are happy to assist you.

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Abdul

Due to work commitments, including temporarily by passing this problem, I have not had the time to reply to your answer.  Which is in general terms a lot of nothing.  Why would corrupt ddl/exe files suddenly stop the ports from working, without any error message, etc. Secondly why would a disable/enable cycle miraculously make a corrupt file suddenly UN-corrupt? 

To prove you wrong.  I clean install windows 10, then let it update to version 1511. (Please note, no additional drivers from motherboard install.  All drivers as supplied with MS Windows.) Same problem!

So I am patiently waiting for a fix that solves the problem. Where possible I enabled "Defer Updates", but that only defer the problem "for several months".  With NO acknowledgement from Microsoft that there is a problem, that maybe to short.  

Kind regards

Cornie

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I'm having same problems with COM ports not visible in device manager.

After 3 complete new installs and running sfc /scannow, this is what I get

Microsoft Windows [Version 10.0.10586]
(c) 2015 Microsoft Corporation. All rights reserved.

C:\WINDOWS\system32> sfc /scannow

Beginning system scan.  This process will take some time.

Beginning verification phase of system scan.
Verification 100% complete.

Windows Resource Protection did not find any integrity violations.

C:\WINDOWS\system32>

Still no COM ports!

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