I have been a Zone Alarm user for over a dozen years. IIRC, for about half of that time I have been using ZAISS (2 registered 3-license packs that I usually re-up for 2 years at a time).
I am beginning to believe that I am in the midst of another such crisis.
Within the past year, or so (possibly as short a time as 6 months, though), I started experiencing "issues" on my two Win7x64 systems (one, each, desktop & laptop). Online videos often will not run, Firefox invisibly hangs during load (necessitating a reboot), several times a week my BT mouse is not recognized (and sometimes the whole driver is tossed, requiring a reboot), the attempt to download some files results in a screenful of what I call ASCII-Hash, certain types of Windows Update files will not install ...
After unsuccessfully trying many different fixes for these myriad annoyances (and noticing that booting into Linux on the laptop resulted in none of these issues), I tumbled to the idea that ZAISS may be the culprit ... and found that if, upon running into one of these issues, I turn OFF ZAISS and then retry the Op, everything works as it should.
For a more extended trial, I uninstalled ZAISS from my Dell laptop and, in its place, installed Windows Firewall Control and -snip- another antivirus (for which I have been a registered user longer than I have been with ZA).
A week has passed since I made the changes on my laptop ... and, for a welcome change, everything on the laptop has worked as it should.
Funny thing was that during the tax season was the time that I discovered the file download issues. I could not download certain (but not all) .PDFs from the Virginia Tax site ... at least, not on either of my Win7x64 systems ... but I could on one of my Vistax86 systems that also sported ZAISS.
So the issues may be x64- and/or Win7-specific.
I will probably leave things as they are for a couple of months to see if one or more ZAISS Updates clear up the issues ... if not, I will probably have to walk away from quite a bit of paid-up service. <shrug>
Hopefully, I will soon see things will clear up on the desktop system. <fingers crossed!>