Prolific USB-to-Serial Comm Port Driver Download

Prolific Drivers

The USB-to-Serial Comm Port is a USB device manufactured by Prolific. This driver can help resolve issues like USB device not recognized, "Disk Not Formatted" errors, or if your device randomly ejects or stops working. This driver - "" - has been downloaded 15,350 times and is rated 4 out of 5 stars based on 66 reviews. Visitors have successfully installed this driver on PCs running Windows XP. The total disk space used for this update is 98.7 KB.

66 Ratings (see all reviews)

Supported Models

Prolific Technologies Inc. 7ST-DH-005

Prolific USB-to-Serial Comm Port



Supported Operating Systems

Windows XP

File Name

Versions (2002-04-09) via .inf

Additional Notes

This driver works for the Prolific Technologies Inc USB to Serial cable using Windows XP as well as some of their other products. The drivers that originally came on the CD with the cable were NOT XP compatible, but the driver offered here is. The installation of the file offered here installs a program called PC-Linq for a different product, but the drivers do work if you are just using the USB to Serial cable with Windows XP! (The particular cable mentioned here is labeled with "CE, FCC, Made In Taiwan, 7ST-DH-005"). You can change the COM PORT the cable operates on by going into Control Panel, System, Hardware, Device Manager, Ports(COM and LPT), and right-clicking on Prolific USB-to-COM Port and selecting Properties, then Port Settings, Advanced. I hope this helps! Enjoy!

Uploaded By

John Kord (DG Member) on 30-Nov-2002

Most Helpful Reviews

4 of 5 people found the following review helpful:
Ryan Deschaine

17 Nov 2007

Installation:  out of 5
Stability:  out of 5
Compatibility:  out of 5
"This was the perfect driver for my usb-to-serial connection for my terminal emulator. Thanks."
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4 of 5 people found the following review helpful:
Tested on Windows XP
12 Sep 2006

Installation: 2 out of 5
Stability: 3 out of 5
Compatibility: 3 out of 5
"Seem to connect after multiple tries of installation. Cannot tell if it does everthing till I find the right communication software that works with the Audiovox 8910"
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See all Prolific USB-to-Serial Comm Port ratings and reviews

Driver Contents File List

The following files are found inside the driver download file.

Name Size Date
ser2pl.inf 1.9 KB 9 Apr 2002
ser2pl.sys 39.6 KB 9 Apr 2002 7.1 KB 30 Apr 2002
DrvRemover.exe 151.8 KB 13 Sep 2000
id.txt 17 bytes 4 Aug 2000
riverLanguageMap.xml 5.2 KB 30 Apr 2002

How to Update Prolific USB-to-Serial Comm Port Device Drivers Quickly & Easily

Step 1 - Download Your Driver

To get the Prolific USB-to-Serial Comm Port driver, click the green download button above. After you complete your download, move on to Step 2.

If the driver listed is not the right version or operating system, search our driver archive for the correct version. Enter Prolific USB-to-Serial Comm Port into the search box above and then submit. In the results, choose the best match for your PC and operating system.

Tech Tip: If you are having trouble deciding which is the right driver, try the Prolific Driver Update Utility. It is a software utility which automatically finds and downloads the right driver.

Step 2 - Install Your Driver

Once you have downloaded your new driver, you'll need to install it. In Windows, use a built-in utility called Device Manager, which allows you to see all of the devices recognized by your system, and the drivers associated with them.

How to Open Device Manager

  • In Windows 11, Windows 10 & Windows 8.1, right-click the Start menu and select Device Manager

  • In Windows 8, swipe up from the bottom, or right-click anywhere on the desktop and choose "All Apps" -> swipe or scroll right and choose "Control Panel" (under Windows System section) -> Hardware and Sound -> Device Manager

  • In Windows 7, click Start -> Control Panel -> Hardware and Sound -> Device Manager

  • In Windows Vista, click Start -> Control Panel -> System and Maintenance -> Device Manager

  • In Windows XP, click Start -> Control Panel -> Performance and Maintenance -> System -> Hardware tab -> Device Manager button

How to Install a driver from Device Manager

  1. Locate the device and model that is having the issue and double-click on it to open the Properties dialog box.

  2. Select the Driver tab.

  3. Click the Update Driver button and follow the instructions.

In most cases, you will need to reboot your computer in order for the driver update to take effect.

Tech Tip: Driver downloads and updates come in a variety of file formats with different file extensions. For example, you may have downloaded an EXE, INF, ZIP, or SYS file. Each file type has a slighty different installation procedure to follow.

For more help, visit our Driver Support Page for step-by-step videos on how to install drivers for every file type.

This website is not affiliated with Prolific. All company names/logos are properties of their owners.
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