Prolific USB to Serial Port Cable Driver Download

Prolific Drivers

The USB to Serial Port Cable 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 10,943 times and is rated 4 out of 5 stars based on 53 reviews. It has been installed successfully by our users on PCs running Windows 10, Windows 7 and Windows XP. The total disk space used for this update is 678.4 KB.

53 Ratings (see all reviews)

Supported Models


Prolific USB-to-Serial Cable

Prolific USB-to-Serial Comm Port

USB to Serial Port

USB to Serial Port Cable



Supported Operating Systems

Windows 2003, Windows XP, Windows 2000, Windows NT4, Windows ME, Windows 98SE, Windows 98, Windows 95

File Name

Versions (2000-09-05) via .inf

Additional Notes

Driver for Mac, win95, win98&ME and win2000 for converter USB to serial DB9

Uploaded By

Alexandre Rodrigues (DG Member) on 4-Dec-2003

Ratings & Reviews

See all Prolific USB to Serial Port Cable ratings and reviews

Driver Contents File List

The following files are found inside the driver download file.

Name Size Date
USB-Serial Adapter (DB9)/MAC/Setup.sit 9.0 KB 12 Oct 2000
USB-Serial Adapter (DB9)/MAC/MAC Manual.doc 179.7 KB 17 Apr 2001
USB-Serial Adapter (DB9)/WIN95/SERPORT.INF 2.2 KB 2 May 2000
USB-Serial Adapter (DB9)/WIN95/USB2SER.SYS 18.9 KB 16 Mar 2000
USB-Serial Adapter (DB9)/WIN95/USB2SER.INF 1.1 KB 2 May 2000
USB-Serial Adapter (DB9)/WIN95/SERPORT.VXD 25.2 KB 25 Feb 2000
USB-Serial Adapter (DB9)/WIN2000/ser2pl.inf 8.1 KB 21 Nov 2000
USB-Serial Adapter (DB9)/WIN2000/ser2pl.sys 47.4 KB 15 Jan 2001
USB-Serial Adapter (DB9)/WIN2000/WIN2000 NB Manual 810 2000.doc 268.8 KB 18 Apr 2001
USB-Serial Adapter (DB9)/WIN2000/id.txt 17 bytes 3 Aug 2000
USB-Serial Adapter (DB9)/WIN2000/UNINSTALL.exe 151.6 KB 12 Sep 2000
USB-Serial Adapter (DB9)/WIN98&ME/UNINSTALL.EXE 127.0 KB 14 Sep 2000
USB-Serial Adapter (DB9)/WIN98&ME/SERSPL.INF 2.3 KB 9 Oct 2000
USB-Serial Adapter (DB9)/WIN98&ME/SER9PL.sys 27.6 KB 16 Jan 2001
USB-Serial Adapter (DB9)/WIN98&ME/SER9PL.INF 753 bytes 9 Oct 2000
USB-Serial Adapter (DB9)/WIN98&ME/WIN98&ME NB Manual.doc 167.4 KB 18 Apr 2001
USB-Serial Adapter (DB9)/WIN98&ME/SERSPL.VXD 27.7 KB 16 Jan 2001

How to Update USB to Serial Port Cable Device Drivers Quickly & Easily

Step 1 - Download Your Driver

To get the USB to Serial Port Cable 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 Port Cable 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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