Download the latest version of the QP-UDB9 driver for your computer's operating system. Visitors have downloaded this file "QPUDB9.zip" 90 times with an aggregate rating of 5 out of 5 stars based on 7 reviews. The uploader reports that this update will work successfully on PCs running Windows Vista and Windows XP. The total disk space used for this update is 1.8 MB.
QP-UDB9
Prolific USB-to-Serial Comm Port
Windows Vista, Windows Vista (64 bit), Windows XP, Windows 2000, Windows ME, Windows 98SE, Mac OS
QPUDB9.zip (1.8 MB)
OS: Mac OS 10.x
USB Driver File
Karthika (DG Staff Member) on 2-Aug-2011
To get the QP-UDB9 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 QPCOM QP-UDB9 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 Driver Update Utility for QPCOM QP-UDB9. It is a software utility which automatically finds and downloads the right driver.
To install your new driver on Windows:
Right-click the Start button.
Click "Device Manager">
Find your device in the list.
Right-click the device and select "Update driver"
Follow the steps on screen.
Restart your computer when done.
This keeps your computer working at its best.
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.
The following files are found inside the driver download file.
Name | Size | Date |
---|---|---|
QPUDB9/MacX/PL2303_1.2.1r2.dmg | 710.5 KB | 21 May 2006 |
QPUDB9/Vista/DRemover.exe | 208.9 KB | 30 Jan 2007 |
QPUDB9/Vista/ser2pl.cat | 11.1 KB | 8 Feb 2007 |
QPUDB9/Vista/ser2pl.inf | 2.8 KB | 1 Feb 2007 |
QPUDB9/Vista/ser2pl.sys | 75.8 KB | 1 Feb 2007 |
QPUDB9/Vista/ser2pl64.sys | 89.6 KB | 1 Feb 2007 |
QPUDB9/Win98_XP/Setup.exe | 1.7 MB | 3 Aug 2005 |