I've had problems with ZA 13.1.211 and MS Excel. If ZA is running and then excel is started, excel just hangs and goes into limbo. The process can't be killed. Killing the process causes it to "disconnect" and just float on it's own but you can't do anything with it. After this happens, any shutdown or restart of the computer causes the computer to also hang. Need unplugged and replugged or psu turned off after that.
OS is XP Pro with SP3. Curious if anyone else has this problem.
Using paid ZA with Av
Solution to get around this has been to shut down ZA, start excel, then restart ZA.
Last ZA without this problem was 11.0.768 that I know.