100% CPU after update firmware

[djrexy]

I tried alpha firmware RT-AC66U_380.68_alpha1-gc798ac2 and after update i have 100% CPU. I back to RT-AC66U_380.67_0 but i have still 100% CPU. I tried reset to defaults settings and still is 100%. Previously on RT-AC66U_380.67_0 was 1-5 %. I just try alpha firmware and now is problem.
Thanks for help!

 

[djrexy]

yes mate , you're right. USB pendrive was attached. Is very strange. 100% overload . This is only 1 pendrive

 

[Blinkyz]

Maybe a corrupted file or video