Feedback, Complaints or Problems

Can you run this command at the command prompt?
sfc /scannow

i've tried it. no problems found.

Have you been using Spotflux or other VPN software?

no. why?

Because that would cause them to not authenticate. Something has changed on your PC or network router device. You'll have to determine what it is and undo it. Otherwise you can try formatting and installing Windows fresh. Your account and the trainers are fine. There is nothing more we can tell you from this end.