Serial COM ports missing after sysprep

Question

Hello,

I am using Win7 Professional x64 on a PICOe-HM650 mainboard which has 3 serial ports. After windows installation I can see all 3 COM ports and a LPT port in device manager and everything works fine.

But after I execute sysprep (generalize) and reboot there are no ports at all in device manager and the serial ports do not work any more. How can I reinstall them?

I already found one solution: When I set the sysprep properties PersistAllDeviceInstalls and DoNotCleanUpNonPresentDevices to 1 the COM ports do not disappear during sysprep execution. But this does not help me a lot because I have to reinstall windows again on many machines.

I already tried to update the drivers, to activate serial ports in Bios and to install COM ports manually but did no have any success.

What else can I do?

Johann

Answer 1

Hi,

Thank you for posting your query on Microsoft Community.

As per the description, I understand that you are facing some issues with Windows.

I would suggest you to refer to the suggestions by Syed N Microsoft Forum Moderator replied on March 28, 2011and check if that helps.

http://answers.microsoft.com/en-us/windows/forum/windows\_7-hardware/com-ports-missing-in-device-manager-in-windows-7/ad7145a3-8e58-e011-8dfc-68b599b31bf5

Hope this information helps. Please let us know if you need any other assistance with Windows in future. We will be happy to assist you.