Yesterday it was working just fine. Today the interface is not found. When I plug it into USB it blinks green a couple of times and that's it. VCDS doesn't see the interface. Windows shows device unrecognised (vendor/device descriptor failure). Tried with 2 different PC and 3 different cars. Any suggestions?

Edit: I tried rebooting windows, reinstalled vcds, etc. No effect.

Cheers,
Rafal