USB to Serial Com port is showing in Device manager, but not in any 3. part software.

Hi

I have a USB to Serial Com port adapter, and it is showing in Device manager (it looks fine COM6).

But when I open any software I use this Com-port, I have no com-port.

I've tried in ex. Putty and Serial Port Monitor.

Hi ThomasRasmussen9,

I'm Paul, a fellow customer like you & an Independent Advisor. What's your computer brand/model? Try rebooting to Safe Mode & see if the issue persists.
https://support.microsoft.com/en-us/help/12376/...

Looking forward to your reply. Thank you!


Sincerely,
Paul A.
Independent Advisor

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Hi 

I can't get into Safe Mode (I do not have the Bitlock key)

It is a HP ZBook Intel Core i7-8750H *** Email address is removed for privacy ***

Hope you can help me anyway :)

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Hi ThomasRasmussen9,

Got it, thanks. Let's do these steps below instead. Thanks.
1. Create a temporary local admin user & login from there.
https://support.microsoft.com/en-us/help/402692...
2. Temporarily disable firewall/anti-virus/anti-malware applications.
3. Disable COM3 & COM4 drivers in Device Manager.
4. Unplug all plug/play devices from PC.
5. Plugin your cable to another built-in USB port with the other end to our device serial port.
6. On your device, make sure that the serial port is open or bypass the firewall in that end.
6. Then do the test in Putty, as per below.
https://www.youtube.com/watch?v=dO-BMOzNKcI

(Note: This is a non-Microsoft website. The page appears to be providing accurate, safe information. Watch out for ads on the site that may advertise products frequently classified as a PUP (Potentially Unwanted Products). Thoroughly research any product advertised on the site before you decide to download and install it.)

I hope this helps. Let me know how you go. Thank you!


Sincerely,
Paul A.
Independent Advisor

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Last updated April 19, 2024 Views 6,725 Applies to: