ST Lab USB TO SERIAL CABLE Driver Download

ST Lab Drivers

The USB TO SERIAL CABLE is a network device manufactured by ST Lab. Issues like weak Wi-Fi signal, slow DNS lookup, duplicate IP addresses, slow network and excessive CPU usage can be solved by updating this driver. This version of "pl2303.exe" is rated (3 out of 5 stars) based on 856 downloads and 11 reviews. Compatibility for this driver update includes PCs running Windows operating systems such as Windows Vista and Windows XP. The total disk space used for this update is 3.9 MB.

11 Ratings

Supported Models


Prolific USB-to-Serial Bridge

USB to Serial Port


ST Lab


Supported Operating Systems

Windows Vista, Windows 2003, Windows XP, Windows 2000

File Name

Additional Notes

USB Devices I



Uploaded By

Karthikkumar (DG Staff Member) on 17-Apr-2009

Driver Contents File List

The following files are found inside the driver download file.

Name Size Date
MAC OS 8&9/PL2303_OS9_v136b1.hqx 12.9 KB 24 Jun 2005
MAC OS 8&9/readme.txt 564 bytes 24 Jun 2005
MAC OS X/PL2303_1.2.1r2.dmg 710.5 KB 21 May 2006
MAC OS X/readme.txt 3.0 KB 22 May 2006
RedHat 7.3&8.0&9.0/Redhat73/Makefile 2.3 KB 29 Mar 2004
RedHat 7.3&8.0&9.0/Redhat73/ReadMe.txt 364 bytes 29 Mar 2004
RedHat 7.3&8.0&9.0/Redhat73/pl2303.c 20.8 KB 29 Mar 2004
RedHat 7.3&8.0&9.0/Redhat8/Makefile 2.3 KB 29 Mar 2004
RedHat 7.3&8.0&9.0/Redhat8/ReadMe.txt 364 bytes 29 Mar 2004
RedHat 7.3&8.0&9.0/Redhat8/pl2303.c 21.0 KB 30 Mar 2004
RedHat 7.3&8.0&9.0/Redhat9/Makefile 2.3 KB 29 Mar 2004
RedHat 7.3&8.0&9.0/Redhat9/ReadMe.txt 364 bytes 29 Mar 2004
RedHat 7.3&8.0&9.0/Redhat9/pl2303.c 20.6 KB 30 Mar 2004
WIN98SE&ME&2K&XP&2003/Setup.exe 1.7 MB 3 Aug 2005
WINXP X64/DRemover_x64.exe 135.2 KB 23 Apr 2003
WINXP X64/PSERENUM.VXD 9.8 KB 23 Apr 2003
WINXP X64/SER9PL.sys 35.5 KB 22 Feb 2005
WINXP X64/SERSPL.INF 2.3 KB 23 Apr 2003
WINXP X64/SERSPL.VXD 26.7 KB 22 Feb 2005
WINXP X64/SERWPL.INF 4.4 KB 14 Jun 2005
WINXP X64/prSeEnum.sys 22.4 KB 23 Apr 2003
WINXP X64/readme.txt 2.2 KB 9 Nov 2005
WINXP X64/ser2pl.sys 119.4 KB 17 Jun 2005
WINXP X64/ser2pl64.sys 144.4 KB 17 Jun 2005
Win_Vista/Setup.exe 2.8 MB 18 Mar 2008

How to Update USB TO SERIAL CABLE Device Drivers Quickly & Easily

Step 1 - Download Your Driver

To get the USB TO SERIAL 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 ST Lab USB TO SERIAL 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 ST Lab 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 ST Lab. All company names/logos are properties of their owners.
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