Hi,

Thank you for writing to Microsoft Community Forums.

Please reply with the following details to assist you further with the issue:

  • When you say, “the virtual drivers that Windows has now do not work” what happens when you connect a device to the Port?
  • Are you able to locate the COM Port drivers in Device Manager?
  • What is the make and model of the computer?

You can try to manually add the legacy hardware for COM port and see if that helps. Please follow the steps mentioned below:

  1. Press Windows key + X, and click on Device Manager.
  2. Click on Action, select Add legacy hardware and click on Next.
  3. Click on Install the hardware that I manually select and click on Next.
  4. Scroll down, select Ports (COM & LTP) and click on Next.
  5. Select the appropriate drivers and click on Next.
  6. Follow the on-screen instructions to complete the process.

Please reply with the status of the issue, we will be glad to help you further.

Regards,

Nikhar Khare

Microsoft Community - Moderator

🌐
Optilab
optilab.com › blogs › software › usb-to-rs232-driver
USB to RS232 Driver – Optilab
May 10, 2023 - Click Here to download the Legacy (prior to Win10) USB to RS232 drivers. Click Here to download the USB to RS232 drivers (x64) Click Here to download the USB to RS232 drivers (x86)
🌐
US Converters
usconverters.com › index.php
USB to RS232 Driver | USB Serial Driver Downloads and Tools : U.S. Converters LLC, Serial Data Communication
U.S. Converters LLC : USB to RS232 Driver | USB Serial Driver Downloads and Tools - Serial Accessories Serial Port Cards USB to RS232 Converters Serial to Ethernet Converters RS232 to RS485 Converters Serial to WiFi Adapters Other converters USB to RS485 Converters MOXA Brand Converters Lantronix Brand Converters Discontinued Products Serial RF Radios Serial Bluetooth Adapters usb serial adapter, rs232, rs485, rs422, Ethernet serial
Discussions

USB to serial adapter driver
Look in Device Mangler in the device properties and get the hardware ID. Then Google that, and it should point you at the adapter or chipset mfgr's website, to download the driver. For future though, just buy one based on an FTDI chip and it'll plug and play in Windows. Other common chips will too, but FTDI seems to be the most reliable in operation. More on reddit.com
🌐 r/PLC
10
3
March 26, 2025
RS232 (COM/Serial) Driver for Windows 10
Hello all, Does anyone know of a COM Port Driver that will work on Windows 10? I have physical ports on a computer and the virtual drivers that Windows has now do not work like my computer did when it was on Windows 7. Thank you, AF More on learn.microsoft.com
🌐 learn.microsoft.com
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1701
August 2, 2019
RS232 Communication - PCIe card or USB to RS232 converter
Further thought: RS232 defines ... if the RS232 devices have full DB25 sockets. ... i got bunch of usb adapters mostly FT232 or Prolific chipsets. they all work. one can get usb hub and connect bunch of usb to serial adapters (most i ever had at the same time was 12). btw. all of them with Prolific chipset look exactly like picture shared by SamR. some of them (including two from StarTech) are not working with latest drivers since chips ... More on forum.allaboutcircuits.com
🌐 forum.allaboutcircuits.com
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April 6, 2026
USB RS232 Serial com port adapters | Diffraction Limited Support Forum
Are you having problems with Windows COM: ports, serial devices, data communications equipment, or certain pieces of astronomical equipment? This... More on forum.diffractionlimited.com
🌐 forum.diffractionlimited.com
May 19, 2021
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Plcdirect
plcdirect.eu › home › downloads › communication products › software › usb-rs232 windows 10 & 11 driver
USB-RS232 Windows 10 & 11 Driver
Search · Login · Select your language · English · Nederlands · default USB-RS232 Windows 10 & 11 Driver · Download · +31(0)318-528020 · sales@plcdirect.eu
🌐
Reddit
reddit.com › r/plc › usb to serial adapter driver
r/PLC on Reddit: USB to serial adapter driver
March 26, 2025 -

Hey yall. New to the automation world. I've got a SLC5 that I'm trying to go online with using an rs232 adapter. I'm missing the driver. The adapter is old as hell so I cant tell the brand. Do I need to download the driver straight from the manufacturer's website? Or is there a general driver i could download.

Ive done this before using different adapters, but I knew the manufacturer in those cases

Thanks

🌐
Boschdiagnostics
cdr.boschdiagnostics.com › cdr › usb-serial-adapter-drivers-click-download-files
USB to Serial Adapter Drivers (click to download files) | Bosch Diagnostics
Jump to navigation · Service Menu · Bosch USA · Bosch Auto Parts · Bosch EV Solutions · Bosch Diagnostics · Robinair · Actron · USB to Serial Adapter Drivers (click to download files)
Find elsewhere
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Plugable
plugable.com › plugable technologies › usb serial adapter drivers (prolific)
USB Serial Adapter Drivers (Prolific) ~ Plugable Technologies
October 1, 2020 - Drivers for the Plugable USB serial adapter using an authentic Prolific chipset, model PL2303-DB9.
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Titan
titan.tw › home › support › usb to serial drivers download
USB to Serial Drivers Download | TITAN Electronics Inc.
July 31, 2025 - You need to install driver first, prior to hardware installation. Do not connect the USB-to-Serial Adapter to the USB port of your computer, before you finish driver installation.
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FTDI
ftdichip.com › home › drivers
Drivers - FTDI
March 17, 2026 - Drivers are available which allow FTDI devices to work with the following operating systems: For most of these operating systems two types of driver are available: Virtual COM Port (VCP) drivers and direct (D2XX) drivers. The VCP driver emulates a standard PC serial port such that the USB device ...
🌐
ELECABLE
elecable.us › pages › usb-c-to-rs232-db9-serial9-pin-adapter-cable-drivers
USB to RS232 DB9 Serial(9-Pin) Adapter/Cable Drivers – ELECABLE
Windows 11 Driver:PL23XX_Prolific_DriverInstaller_v300 Support: Windows 11 ( 64-bit ) Windows 7-10 Driver:PL23XX_Prolific_DriverInstaller_v205 Support: Windows 7-10 macOS Driver:PL2303HXD_G_Mac Driver_v2.2.0_20220630.pkg Support: Mac OS Monterey (version 12.4) Mac OS Big Sur (version 11) - see NOTE#1 below.
🌐
Gearmo
gearmo.com › home › shop › usb to serial adapters › usb to serial adapters
USB to Serial Adapters - Gearmo
USB to Serial adapters and cables for device and terminal use. USB to terminal wire connectors with mountable serial RS-232, RS-422, & RS-485 converters.
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US Converters
usconverters.com › usb-serial-converter-4-port
Large Selection of USB-RS232 adapters, Easy Installation and Setup of USB RS232 COM ports.
Use this USB-RS232 Adapter for creating a USB RS232 COM port. Online Support, Low Prices and Fast Shipping within USA.
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Plugable
kb.plugable.com › serial-adapter › installing-the-plugable-usb-to-rs-232-db9-serial-adapter-on-windows-7
How to Install the Plugable USB to RS-232 DB9 Serial Adapter on Windows 7 - Plugable Knowledge Base
The Plugable USB to Serial adapter (PL2303-DB9) can be installed on Windows 7 by downloading the recommended Prolific driver, running the installer, and then connecting the device.
🌐
Tri-plc
tri-plc.com › USB-RS232 › drivers.htm
USB-RS232 Serial Converter Driver Download
Windows 7 64-bit & 32-bit, Windows Vista 64-bit & 32-bit, Windows XP, Windows 2000, Windows Me, Windows 98 · Important note regarding Windows 7 and Vista: The driver MUST be installed "as Administrator" Right-click the downloaded EXE file and choose Run as administrator
🌐
All About Circuits
forum.allaboutcircuits.com › home › forums › hardware design › general electronics chat
RS232 Communication - PCIe card or USB to RS232 converter | All About Circuits
April 6, 2026 - Further thought: RS232 defines the DB25 connector for DTE/DCE connection though the use of DB9 is quite common, so its possible a DB9 to DB25 adapter cable may be necessary if the RS232 devices have full DB25 sockets.
🌐
Diffractionlimited
forum.diffractionlimited.com › threads › usb-rs232-serial-com-port-adapters.8382
USB RS232 Serial com port adapters | Diffraction Limited Support Forum
May 19, 2021 - Are you having problems with Windows COM: ports, serial devices, data communications equipment, or certain pieces of astronomical equipment? This...
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HP Support Community
h30434.www3.hp.com › t5 › Notebooks-Archive-Read-Only › Need-the-Prolific-USB-to-Serial-Comm-Port-Driver › td-p › 8930213
Need the Prolific USB-to-Serial Comm Port Driver - HP Support Community - 8930213
December 9, 2023 - Hello, I need an updated driver for the following Prolific USB-to-Serial Comm Port Driver as the driver I have is to old, find that I am having - 8930213
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StarTech.com
startech.com › home › add-on cards & peripherals › serial cards & adapters › icusb232pro
1 ft USB to Serial DB9 Adapter Cable | USB Serial Adapters
1 ft USB to RS232 Serial DB9 Adapter Cable with COM Retention - TAA
1 ft USB to RS232 Serial DB9 Adapter Cable with COM Retention - TAA
Price   $37.91
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DataPro
datapro.net › products › usb-to-rs232-serial-converter.html
USB to RS232 Serial Converter -- DataPro
This USB-to-RS232 Serial converter cable, formerly part number US-109A, will allow any USB-equipped Windows computer to converse with a 9-pin RS232 device.