Device manager shows hidden devices for Non Plug and Play Drivers marked with a yellow star ....My pc is suddenly super slow when I google search and will time out, then it says cannot display web page....system information has critical error control on 16 kernel drivers..Do I start or stop non plug and play? Or is the critical error control the reason my pc is crawling? I have checked for virus and malware...and there is none..Im using mcfee security suite...What doI need to do to fix my pc?