Prosys-Tec U8668-D_7.x Driver Download (Official)

Download the latest version of the U8668-D_7.x driver for your computer's operating system. This version of "" is rated (1 out of 5 stars) based on 90 downloads and 10 reviews. Compatibility for this driver update includes PCs running Windows operating systems such as Windows XP. The total disk space used for this update is 994.3 KB.

10 Ratings

Supported Models





HSP56 MR (Intel)

HSP56 MR (NVidia)

HSP56 MR (Realtek)





Supported Operating Systems

Windows XP

File Name


12.0300.0025 (2003-12-18) via .inf

Additional Notes


Drv_Modem_PCTel_WXP_12.0300.0025 Driver File

Uploaded By

Saktheesh (DG Staff Member) on 8-Aug-2008

Driver Contents File List

The following files are found inside the driver download file.

Name Size Date
MDMCHIPV.CAT 36 bytes 5 Jun 2000
Mdmchipv.inf 44.2 KB 10 Jun 2004
PCTSPK.EXE 180.2 KB 18 Dec 2003
PTSERIAL.SYS 356.4 KB 18 Dec 2003
PTSETUP.DLL 155.6 KB 18 Dec 2003
PTUNINST.EXE 131.1 KB 18 Dec 2003
PV92Tray.exe 323.6 KB 18 Dec 2003
VMODEM.SYS 703.7 KB 18 Dec 2003
VPCTCOM.SYS 801.9 KB 18 Dec 2003
VVOICE.SYS 70.4 KB 18 Dec 2003

How to Update U8668-D_7.x Device Drivers Quickly & Easily

Step 1 - Download Your Driver

To get the U8668-D_7.x 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 Prosys-Tec U8668-D_7.x 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 Prosys-Tec U8668-D_7.x. 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.

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