I've even tried the Rkill software, in case it was some kind of virus or malware which hid itself from detection, but the program hasn't found anything to terminate. Smart Scans, Complete Scans, and a bunch of scans with MalwareBytes too (Threat Scans, Custom Scans with all options enabled, Hypers Scans). I've done a lot of different scans between now and the first time I've seen the disabling happen. I've noticed that Avast does the same thing with my mother's laptop (the Behavior Shield thing, I mean, she doesn't have BSODs). I've also been getting BSODs this month (four of them, three were BAD_HEADER_POOL and one was DRIVER_IRQL_NOT_LESS_OR_EQUAL), but I'm not sure the two issues are related in any way. Select Start > Settings > Update & Security > Windows Security > Virus & threat protection > Manage settings (or Virus & threat protection settings in previous versions of Windows 10). However, keep in mind that if you do, your device may be vulnerable to threats. Follow these steps to temporarily turn off real-time Microsoft Defender antivirus protection in Windows Security. Originally, it would do it only occasionally, but now it's almost every day. Turn off Defender antivirus protection in Windows Security. 182), but it has been doing that for a few weeks now, even with previous versions. I've got the latest free build, I think: (build. I always turn it back on right away, but it worries me a bit. My Behavior Shield is often turned off when I boot up my computer (I'm on Windows 7), or turns itself off shortly afterwards. Hello everyone, I've got an issue with Avast.