Restart your computer if you haven't done so already.
Remove or reconfigure the newly installed device.
Roll back the driver to a version prior to your update.
Use System Restore to undo recent Device Manager related changes.
Note: Properly reinstalling a driver, as in the instructions linked above, is not the same as simply updating a driver. A full driver reinstall involves completely removing the currently installed driver and then letting Windows install it over again from scratch.
Update the drivers for the device. It's possible that installing the latest manufacturer supplied drivers for a device could fix the Code 39 error. If this works, it means that the drivers that you reinstalled were probably corrupted.
Replace the hardware. As a last resort, due to a malfunction with the hardware, you may need to replace the device with the Code 39 error.
It's also possible that the device is not compatible with your version of Windows.
try a repair install of Windows and if that doesn't work, a clean install of Windows.