WD TV Live hangs up every 10 Minutes after FW Update 2.01.86

Since I did update my WD TV Live to FW Update 2.01.86 the system hangs up every 10-20 minutes while playing any AVI or MKV video files from a fresh NTFS formatted Kingston HyperX USB Stick.

This video files were played without any trouble with the older firmware (version unknown, didn´t care about this) and also play without trouble on my Samsung LCD TV and Philips BluRay player.

I only can restart the box with interrupting the power supply.

Also: With the system startup I get a message that an external WLAN adapte is connected to the box and is in use ?!?!?!

What´s going on and what can I do?

Harry

Did you try a reset of the box to factory settings?

Yes, I already did it.
Didn’t solve the problem…

If a reset didn’t work, I’d try rolling back to the previous firmware version then.