I had the same trouble when running RB 3.13 w/driver 2.6.0.0 on WinXP SP3 and all updates......could never overcome it, tried everything for days, finally installed VirtualBox from Sun on my MAC and run it there, works great non-stop now. I have seen up to 72 messages per second decoded with a lousy no-gain discone in the attic. The RB LED's light up the room in the dark!
For some reason, it would work great on start-up, then after about 2-2 1/2 mins, the 'signal' LED would stop flashing, then in another 2-2 1/2 mins, the 'USB' LED would slow down, then stop altogether; after 5 minutes total running time, the box was dead. Re-seating the USB cable brought it back to life for another 5 mins. A different USB cable did nothing for me.
Good luck getting yours to run; it will, just need to find the 'right' setup for your machine.