Hi Tom,
I am running the Nexus and have had no problems at all.
Runs ok on my PC and laptop, both running XP sp3. and the latest version of WD
In WD I have it using chan.0 for outside temp and have Use direct ticked.
Sensor and console set to chan. 1
Consol is running on mains adapter power.
Your problem sounds more like USB or OS related.
Just a thought, does it run ok on the TFA software.
Mick