Prolific USB-to-Serial Bridge Driver Download

Prolific Drivers

The USB-to-Serial Bridge 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 3,120 times and is rated 4 out of 5 stars based on 29 reviews. Our users report success installing this driver update on PCs running Windows XP. The total disk space used for this update is 244.7 KB.

29 Ratings (see all reviews)

Supported Models

USB to Serial Port

Prolific USB-to-Serial Bridge



Supported Operating Systems

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

File Name

Additional Notes

Load driver first then attach device to USB port. Corrects problems with Windows XP where streaming serial data on COM port (when port not selected)causes Windows XP to blue screen.

Uploaded By

Tony C. (DG Member) on 12-Mar-2004

Ratings & Reviews

See all Prolific USB-to-Serial Bridge ratings and reviews

Driver Contents File List

The following files are found inside the driver download file.

Name Size Date
Drive/IMAC/Mac OS 10.1.x and 10.2.x/md_pl2303x_v1[1] 24.8 KB 1 Sep 2003
Drive/IMAC/iMAC OS 8.X, 9.X/md_pl2303x_v1[1].3.0b2.hqx 25.3 KB 1 Sep 2003
Drive/INF/ 199.5 KB 18 Aug 2003
Drive/INF/ 135.2 KB 7 Nov 2001
Drive/INF/ 194.1 KB 12 Aug 2003
Drive/INF/ 2.3 KB 23 May 2001
Drive/INF/ 26.7 KB 12 Aug 2003
Drive/INF/ 8.6 KB 13 Aug 2003
Drive/INF/ 112.0 KB 31 Jul 2003

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

Step 1 - Download Your Driver

To get the Prolific USB-to-Serial Bridge 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 Bridge 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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