SCM Microsystems SCR331 Driver Download

SCM Microsystems Drivers

The SCR331 is a card reader manufactured by SCM Microsystems. This driver - "" - has been downloaded 3,623 times and is rated 3 out of 5 stars based on 13 reviews. It has been installed successfully by our users on PCs running Windows XP. The total disk space used for this update is 92.9 KB.

13 Ratings

Supported Models


Expresscard USB SIM Card Reader

Expresscard USB Smart Card Reader

SCR3310 USB Smart Card Reader

SCR333 Internal Smart Card Reader

SCR335 USB Smart Card Reader

SCR33X USB Smart Card Reader

USB SIM Card Reader


SCM Microsystems

Supported Operating Systems

Windows 2003, Windows XP, Windows 2000, Windows ME, Windows 98SE, Windows 98

File Name

Versions (2003-04-01) via .inf

Additional Notes

Secure Card Readers

This archive contains the drivers that have to be installed through plug-n-play. The drivers can be used for SCR531 USB, SCR331 CCID, SCR333, SCR335 and SCR3310.

SCR331 users note that only readers that have CCID firmware are supported. Readers that have firmware Rev 2.0 and above are CCID.

This driver may also be used with the following third party products: Goldtouch ErgoSecure SC 2.0 keyboard, Datakey DKR830.

If the host is running Windows 98, Windows 98 SE or Windows Me, ensure that Microsoft Smart Card Base Components are installed on the host before atempting to install the drivers.

Uploaded By

sundar (DG Staff Member) on 29-Apr-2005

Driver Contents File List

The following files are found inside the driver download file.

Name Size Date
Win9x, Me/Rdr_Svr.sys 24.2 KB 12 Sep 2003
Win9x, Me/SCR33X9X.inf 3.8 KB 6 Apr 2004
Win9x, Me/RDR_SVR.vxd 14.6 KB 12 Sep 2003
Win9x, Me/SCR33X9X.SYS 61.6 KB 6 Apr 2004
Win2K, XP/SCR33X2K.sys 64.1 KB 6 Apr 2004
Win2K, XP/ 8.4 KB 18 May 2004
Win2K, XP/SCR33X2K.inf 4.0 KB 6 Apr 2004

How to Update SCR331 Device Drivers Quickly & Easily

Step 1 - Download Your Driver

To get the SCR331 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 SCM Microsystems SCR331 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 SCM Microsystems 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 SCM Microsystems website. Most major device manufacturers update their drivers regularly.

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.

This website is not affiliated with SCM Microsystems. All company names/logos are properties of their owners.
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