We have just updated to the lasted version and since then it looks like AVAST is locking down the USB ports in some way to prevent running malware off USB keys. It could also be that the new version has modified the registry or removing the OPOS entries because AVAST does not recognize them. It could also be that AVAST doesn’t recognize the AIP* processes/services and these are being blocked
Could any of the above be possible with the latest version of Anti Virus?