The AUA-3121 is a USB device manufactured by Adaptec. 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 version of "usb2_win_drv_v21.exe" is rated (5 out of 5 stars) based on 33 downloads and 9 reviews. The uploader reports that this update will work successfully on PCs running Windows XP. The total disk space used for this update is 143.9 KB.
AUA-3121
Adaptec AUA-1420 CardBus USB Enhanced Host Controller
Adaptec AUA-2000LP PCI to USB Enhanced Host Controller
Adaptec AUA-2200LP PCI to USB Enhanced Host Controller
Adaptec AUA-3100LP PCI to USB Enhanced Host Controller
Adaptec AUA-3121 PCI to USB Enhanced Host Controller
Adaptec AUA-3200LP PCI to USB Enhanced Host Controller
Windows XP, Windows 2000, Windows ME, Windows 98SE
usb2_win_drv_v21.exe (143.9 KB)
2.1.3000.2000 (2002-01-16) via .inf
USB 2.0 Driver version 2.1 for Windows
Rajesh (DG Staff Member) on 1-Jun-2004
To get the AUA-3121 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 Adaptec AUA-3121 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 Adaptec Driver Update Utility. It is a software utility which automatically finds and downloads the right driver.
To find the newest driver, you may need to visit the Adaptec website. Most major device manufacturers update their drivers regularly.
After you get your new driver, you need to put it on your computer. On Windows, there's a tool called Device Manager that helps with this. It shows you all the parts of your computer and the drivers they use. To finish setting up the new driver, you'll probably need to turn your computer off and on again.
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 |
|---|---|---|
| Readme.txt | 8.5 KB | 16 Jan 2002 |
| aucbpnp.exe | 139.3 KB | 16 Jan 2002 |
| aehcd.sys | 34.3 KB | 16 Jan 2002 |
| ausb2hub.sys | 24.4 KB | 16 Jan 2002 |
| adptusb2.inf | 6.3 KB | 16 Jan 2002 |
| ausbd.sys | 22.4 KB | 16 Jan 2002 |
| AUCBHLPR.VXD | 7.4 KB | 16 Jan 2002 |