Omega Prolific USB-to-Serial Comm Port Driver Download

Omega Drivers

The Prolific USB-to-Serial Comm Port is a USB device manufactured by Omega. 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 15,250 times and is rated 5 out of 5 stars based on 80 reviews. It has been installed successfully by our users on PCs running Windows 8, Windows 7, Windows Vista and Windows XP. The total disk space used for this update is 251.6 KB.

80 Ratings (see all reviews)

Supported Models


Prolific USB-to-Serial Cable

Prolific USB-to-Serial Comm Port

USB to Serial Port




Supported Operating Systems

Windows XP, Windows 2000, Windows ME, Windows 98SE, Windows 98, Mac OSX

File Name

Versions (2000-09-05) via .inf (2001-03-29) via .inf (2002-04-09) via .inf

Additional Notes

I found this in a search google search "USB-2309 DRIVER" in a brazilian web page / and it works very fine

Uploaded By

CAESAR (DG Member) on 3-Jan-2006

Most Helpful Reviews

5 of 6 people found the following review helpful:
Tested on Windows Vista
12 Oct 2009
(3 months after download)

Installation:  out of 5
Stability:  out of 5
Compatibility:  out of 5
"Didn't work on vista nor xp."
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5 of 6 people found the following review helpful:

14 Sep 2007

Installation:  out of 5
Stability:  out of 5
Compatibility:  out of 5
"I don't find the omega driver (usb to serial) for windows 98, windows operating system"
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4 of 5 people found the following review helpful:
Keber Flores
Tested on Windows XP
4 Feb 2009
(32 minutes after download)

Installation: 5 out of 5
Stability: 5 out of 5
Compatibility: 5 out of 5
"Excellent, it works, enough to me."
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See all Omega 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
I-mac/PL2303G.SIT 9.0 KB 1 Dec 2000
I-mac/README.TXT 177 bytes 1 Dec 2000
Win98_ME/DREMOV~1.EXE 139.3 KB 12 Jan 2001
Win98_ME/README.PDF 3.5 KB 15 Jan 2001
Win98_ME/SER9PL.INF 753 bytes 9 Oct 2000
Win98_ME/SER9PL.sys 27.4 KB 13 Jan 2001
Win98_ME/SERSPL.INF 2.3 KB 9 Oct 2000
Win98_ME/SERSPL.VXD 27.7 KB 13 Jan 2001
win2000/DRVREM~1.EXE 151.6 KB 13 Sep 2000
win2000/ID.TXT 17 bytes 4 Aug 2000
win2000/SER2PL.INF 8.1 KB 5 Sep 2000
win2000/SER2PL.SYS 47.3 KB 14 Sep 2000
xp(V2)/id.txt 17 bytes 4 Aug 2000
xp(V2)/ 7.1 KB 30 Apr 2002
xp(V2)/riverLanguageMap.xml 5.2 KB 30 Apr 2002
xp(V2)/ser2pl.inf 1.9 KB 9 Apr 2002
xp(V2)/ser2pl.sys 39.6 KB 9 Apr 2002
xp/SERWPL.INF 2.6 KB 29 Mar 2001
xp/ser2pl.sys 41.8 KB 5 Dec 2001

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 Omega 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 Omega 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 Omega. All company names/logos are properties of their owners.
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