I’ve run FW again and it worked fine, but the problem was that when I installed the latest dell driver package it was a problem. The updating FW loop is continuous, and it does not work. I tried to install manual, but when windows update Cierra sensor location, it has FW loop update error. I tried updating the newer fw from dell but the problem was not resolved. It only works with FW 1102424_9904336_EM7455_01.08.07.00_00_Dell_001.001_000.spk