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COM Port problems with XP Service Pack 2

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8 replies

by surfwebmonkey

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Curently have 24 COM ports installed and in use - alledgely!! This problem started after the installation of service pack 2... some of the software I use cannot access COM ports with this high number... how and where can I remove these ghost COM ports..??

8 replies

by ayna_san

WHEN I START LAPTOP XPS2 SYSTEM DOESN'T GIVE CONNECTION TO USB TO SERIAL CABLE AS COM1. THEN I GO TO DEVICE MANAGER AND SELECT THE SERIAL ON USB PORT (COM1) THEN GO PROPERTIES CHANGE THE COM PORT TO ANYOTHER FREE COM PORT AND SAVE. WITHOUT SWITCH OFF THE LAPTOP I SCAN FOR HARDWARE CHANGES AFTER THAT CHANGE TO COM1 AND RE-SCAN. AFTER THAT IT WORKS. WHAT COULD BE THE PROBLEM.

by surfwebmonkey

Many thanks for the responses... I have tried ALL possible combinations of removal & adding COM ports from CP & Device Manager. What i sneeded is a registry hack..??

by chuba

Go to the device manager, take any COM port. Go to Properties->Port Settings->Advanced.
Select one of the "in use" ports and dismiss the warning. Repeat this for all "in use" ports. Afterwards they are free to use again.
ok its akward, but the only thing I could find.
Cheers,
Chuba

by rager

Chuba,

Thanks for your solution, as well. Anything to remove cruft and bits of bad programs!

by ayna_san

I have XPS2 laptop. I want to run an application with the help of USB to SERIAl Cable (RS232). I installed the software for the cable and went to device manager selected the device from there and changed the COM port to COM1 (BECAUSE MY APPLICATION WILL RUN ONLY UNDER COM1.) after ther rebbot and run the application, it give error that "Hardware not present or Locked by another device." Could you please help to solve this problem.

I did the way mentioned your last reply. doesn't work.

thanks + best regard
abdul naser

I did it, stil the problem remaing

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