My apologies, I was in a bit of a stressful state after having emails to Magix not go through.
I do not run AV software. I have been using ACID since Sony first launched it and purchased Pro 7 and then 8 from Magix. I have never had a single issue until this last update which is causing a myriad of problems.
Nothing has changed on this computer with exception of the update - in which the problems started immediately upon installing.
Does that mean you have no 3rd party Antivirus software installed and you have permanently disabled, which should be impossible, Windows Defender ?
With no 3rd party AV installed then Windows Defender, by default, is your AV/Firewall in which case the Ransomware Protection fix is still the potential cause of the issues.