Very strange. The only time I have had problems with AB is when using Internet Explorer.
Perhaps you have 'nasties' lurking in your comps.
If you haven't any Anti Malware installed, I suggest you download and do a scan with the free edition of Malwarebytes. Do Not accept a trial version of the Pro Edition which is unecessary and costs money.
https://www.malwarebytes.org/
Hans.