Download the latest version of the QSU-100 driver for your computer's operating system. This driver - "usb580.exe" - has been downloaded 228 times and is rated 5 out of 5 stars based on 6 reviews. The uploader reports that this update will work successfully on PCs running Windows XP. The total disk space used for this update is 187.4 KB.
QSU-100
DSU-100 Dual RS-232 Serial Ports
DSU-200/300 Dual RS-422/485 Serial Ports
ESU-100 Eight RS-232 Serial Ports 1-4
ESU-100 Eight RS-232 Serial Ports 5-8
ESU-200/300 Eight RS-422/485 Serial Ports 1-4
ESU-200/300 Eight RS-422/485 Serial Ports 5-8
HSU-100 Sixteen RS-232 Serial Ports 01-04
Windows XP, Windows 2000
usb580.exe (187.4 KB)
5.80 (2005-01-11) via .inf
5.80 (2005-01-10) via .inf
QSU-100
Driver Version 5.80--WHQL signed
Nagarajah (DG Staff Member) on 21-Feb-2006
To get the QSU-100 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 Quatech QSU-100 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 Quatech QSU-100. It is a software utility which automatically finds and downloads the right driver.
Installing your newly downloaded driver is a straightforward process. Windows provides a dedicated tool called Device Manager for this purpose. Follow these steps to update your driver:
Access the Quick Access menu by right-clicking the Start button.
From the menu options, choose "Device Manager".
Within Device Manager, identify the device requiring the driver update.
Open the context menu for the device by right-clicking its name.
Select "Update driver" and proceed through the guided installation.
To complete the process, reboot your computer. This ensures the new driver is fully integrated into your system.
Regular driver updates contribute to optimal system performance and hardware compatibility.
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 |
|---|---|---|
| QTUSBBX2.INF | 7.4 KB | 11 Jan 2005 |
| QTUSBCOM.DLL | 19.8 KB | 12 Aug 2004 |
| QTUSBCOM.SYS | 63.3 KB | 11 Aug 2004 |
| QTUSBPT2.INF | 3.5 KB | 10 Jan 2005 |
| SERQTUSB.VXD | 7.8 KB | 26 Oct 2001 |
| cocpyinf.dll | 22.0 KB | 16 Apr 2003 |
| history.txt | 16.3 KB | 21 Jan 2005 |
| qtucombx.sys | 93.3 KB | 31 Jan 2005 |
| qtucomco.dll | 6.1 KB | 10 Jan 2005 |
| qtucompp.dll | 37.9 KB | 10 Jan 2005 |
| qtucompt.sys | 57.9 KB | 20 Jan 2005 |
| qtusbbx2.cat | 11.5 KB | 8 Feb 2005 |
| qtusbpt2.cat | 8.9 KB | 8 Feb 2005 |
| qtwdmlib.sys | 18.0 KB | 17 Jan 2005 |
| readme.txt | 9.8 KB | 14 Apr 2003 |