After installing the brand new version of Windows 10 on my machine (clean install), Avast is completely blocked from exiting passive mode by Windows Defender Security Center. Even restarting the computer like Avast asks me to, doesn't change anything. In order to bypass this, I had to disable Windows Defender, enable Avast (Free btw) in the control panel and then turn off the Passive mode by going into the AV settings and flipping the little switch. After doing this, everything seems to go back to normal with all the components working like they should. The only down side (which honestly isn't such a big deal) is WDSC not being able to tell the state of Avast Free Antivirus.