Quatech ESU2-100 Driver Download (Official)

Download the latest version of the ESU2-100 driver for your computer's operating system. This version of "usb716.zip" is rated (5 out of 5 stars) based on 39 downloads and 4 reviews. It is compatible with PCs running Windows Vista and Windows XP, among other operating systems. The total disk space used for this update is 172.9 KB.

4 Ratings

Supported Models


DSU-100 Dual RS-232 Serial Ports

DSU-200/300 Dual RS-422/485 Serial Ports

DSU2-100 Dual RS-232 Serial Ports

DSU2-400 Dual RS-232/422/485 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



Supported Operating Systems

Windows Vista, Windows XP, Windows 2000

File Name


7.167.16 (2007-02-09) via .inf

Additional Notes


USB Serial Adapter Driver File

Uploaded By

Malathy (DG Staff Member) on 5-Mar-2007

How to Update ESU2-100 Device Drivers

Step 1 - Download Your Driver

To get the ESU2-100 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 ESU2-100 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 ESU2-100. It is a software utility which automatically finds and downloads the right driver.

Step 2 - Install Your 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:

  1. Access the Quick Access menu by right-clicking the Start button.

  2. From the menu options, choose "Device Manager".

  3. Within Device Manager, identify the device requiring the driver update.

  4. Open the context menu for the device by right-clicking its name.

  5. 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.

Driver Contents File List

The following files are found inside the driver download file.

Name Size Date
QTUSBBX2.INF 9.4 KB 9 Feb 2007
QTUSBCOM.DLL 19.8 KB 12 Aug 2004
QTUSBCOM.SYS 63.6 KB 2 Dec 2005
QTUSBPT2.INF 4.4 KB 9 Feb 2007
SERQTUSB.VXD 7.8 KB 26 Oct 2001
cocpyinf.dll 22.0 KB 16 Apr 2003
history.txt 19.2 KB 9 Feb 2007
qtucombx.sys 103.3 KB 9 Feb 2007
qtucomco.dll 15.4 KB 22 Feb 2006
qtucompp.dll 43.5 KB 25 Jan 2007
qtucompt.sys 57.9 KB 25 Jan 2007
qtusbbx2.cat 12.4 KB 28 Aug 2006
qtusbpt2.cat 9.8 KB 28 Aug 2006
qtwdmlib.sys 17.9 KB 23 May 2005
readme.txt 10.4 KB 24 Aug 2006
This website is not affiliated with Quatech. All company names/logos are properties of their owners.
server: web5, load: 0.91