JMicron JMB381 Driver Download

JMicron Drivers

The JMB381 is a network device manufactured by JMicron. Issues like weak Wi-Fi signal, slow DNS lookup, duplicate IP addresses, slow network and excessive CPU usage can be solved by updating this driver. This update - "" - has an average rating of 4 out of 5 stars based on 3 reviews, and has been downloaded 68 times. Compatibility for this driver update includes PCs running Windows operating systems such as Windows 7, Windows Vista and Windows XP. The total disk space used for this update is 925.6 KB.

3 Ratings

Supported Models




Supported Operating Systems

Windows 7, Windows Vista, Windows XP

File Name


R1.00.24 (11-Feb-2009) (2009-02-03) via .inf

Additional Notes

JMB38X Product Family

PCI Express to 1394a OHCI and Memory Card Host Controller Driver File

Uploaded By

Sathishkumar (DG Staff Member) on 15-Dec-2009

Driver Contents File List

The following files are found inside the driver download file.

Name Size Date
JMB38X_WinDrv_R1.00.24.12_NS_WHQL/Application/DIFxAPI.dll 319.5 KB 2 Nov 2006
JMB38X_WinDrv_R1.00.24.12_NS_WHQL/Application/res/x32/JmCrIcon.dll 110.1 KB 14 May 2008
JMB38X_WinDrv_R1.00.24.12_NS_WHQL/Application/res/x64/JmCrIcon.dll 109.6 KB 14 May 2008
JMB38X_WinDrv_R1.00.24.12_NS_WHQL/Application/setup.dll 73.7 KB 19 Dec 2008
JMB38X_WinDrv_R1.00.24.12_NS_WHQL/Application/x64/DIFxAPI.dll 525.8 KB 2 Nov 2006
JMB38X_WinDrv_R1.00.24.12_NS_WHQL/Driver/x32/JmCR.sys 112.5 KB 3 Feb 2009
JMB38X_WinDrv_R1.00.24.12_NS_WHQL/Driver/x32/ 84.2 KB 4 Feb 2009
JMB38X_WinDrv_R1.00.24.12_NS_WHQL/Driver/x32/jmcr.inf 113.0 KB 2 Feb 2009
JMB38X_WinDrv_R1.00.24.12_NS_WHQL/Driver/x32/jmcr_ns.inf 112.6 KB 2 Feb 2009
JMB38X_WinDrv_R1.00.24.12_NS_WHQL/Driver/x64/JmCR.sys 136.0 KB 3 Feb 2009
JMB38X_WinDrv_R1.00.24.12_NS_WHQL/Driver/x64/ 84.3 KB 4 Feb 2009
JMB38X_WinDrv_R1.00.24.12_NS_WHQL/Driver/x64/jmcr.inf 113.0 KB 2 Feb 2009
JMB38X_WinDrv_R1.00.24.12_NS_WHQL/Driver/x64/jmcr_ns.inf 112.6 KB 2 Feb 2009
JMB38X_WinDrv_R1.00.24.12_NS_WHQL/Setup.exe 1.1 MB 17 Dec 2008
JMB38X_WinDrv_R1.00.24.12_NS_WHQL/setup.ini 2.9 KB 5 Feb 2009
JMB38X_WinDrv_R1.00.24.12_NS_WHQL/silentsetup.bat 12 bytes 25 Jun 2007

How to Update JMB381 Device Drivers Quickly & Easily

Step 1 - Download Your Driver

To get the JMB381 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 JMicron JMB381 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 JMicron 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 JMicron 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 JMicron. All company names/logos are properties of their owners.
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