Prolific dx-ubdb9 Driver Download

Prolific Drivers

The dx-ubdb9 is a modem manufactured by Prolific. If you cannot connect to the network, or have slow transfer speeds or intermittent disconnection problems, you may need to update your modem driver or firmware. Visitors have downloaded this file "" 1,737 times with an aggregate rating of 5 out of 5 stars based on 5 reviews. Our users report success installing this driver update on PCs running Windows XP. The total disk space used for this update is 121.9 KB.

5 Ratings

Supported Models


Prolific USB-to-Serial Bridge

Prolific USB-to-Serial Comm Port

USB to Serial Port



Supported Operating Systems

Windows 2003, Windows XP, Windows 2000, Windows NT4, Windows 95

File Name

Versions (2003-07-16) via .inf

Additional Notes

This is a zip file that was created off the Install CD. Extract files to desktop, right-click on the .inf files. and select Install. Works for me, should work for you.

Uploaded By

Prius (DG Member) on 28-Sep-2005

Driver Contents File List

The following files are found inside the driver download file.

Name Size Date
DRemover98_2K.exe 135.2 KB 7 Nov 2001
PL2303.CAT 7.6 KB 21 Aug 2003
SER2PL.INF 1.9 KB 16 Jul 2003
SER2PL.SYS 43.3 KB 15 Jul 2003
SER9PL.SYS 34.4 KB 8 Apr 2004
SERSPL.INF 2.3 KB 22 May 2001
SERSPL.VXD 26.7 KB 6 Apr 2004
SERWPL.INF 8.6 KB 10 May 2004

How to Update dx-ubdb9 Device Drivers Quickly & Easily

Step 1 - Download Your Driver

To get the dx-ubdb9 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 dx-ubdb9 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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