I used to use:
Avast for Free.........now trying Panda, after all the Avast issues.
Kaspersky for paid........but now the 2016 version will not work with Sandboxie. My favorite combo for "problem" people.
Really pushed Kaspersky, even my home machines, but had to remove, because I really like sandboxie.
Talked to Kaspersky tech support and was told only option is to remove Sandboxie.
Also, just bought 5 Kaspersky keys from Newegg, only to find out they will only work with 2016 version.
I have several 2014 and 2015 versions installed with sandboxie and running fine, but subscription expired.
Kaspersky said only thing to do is remove old version, re-move licensing info, install 2016, re-configure, etc. etc. all to renew subscription.
WTF........a real PITA, when before I could just plug in a new activation code.
Very frustrating.