This utility mentioned in my older post
might help you to identify the related unknown hardware.
EDIT: I took and updated the latest beta of UnknowDevices with newest hardware reference files (for PCI ID and USB), just to make it easier for you. You can download it on RapidShare
. Download the archive, unzip the archive named UnknownDevices.zip somewhere (not the DeviceLists.zip) and run the executable.
Note: I was just checking support site for MegaBook VR321
. As mentioned here, it should be equipped with AzureWave's AW-GE780
WLAN module, which (as most or all their products) uses WLAN chipset from Atheros
There is no official source for Atheros's drivers, but after you identify the right WLAN chipset with UnknownDevices, go to website called Atheros.cz
and you'll find newest drivers without a problem.