I never had a problem with the network while using it. Although I admit that the popups are annoying. There aren't that many alternatives to choose from these days anyways.UPDATE:
After about a month, I ended up removing 360 Total Security from both of the machines I had installed it on. In my case, it not only messed up all the network addresses of those two machines, but other machines in the network as well. The problem seemed to be intermittent, and quite frustrating. Sometimes the networking capabilities resumed after rebooting both machines, but it was just too much of a bother. The damn popups didn't help much either.
I've been using Avast for years, and it is currently 'working' on my XP computer, but it is not letting me input my activation code, which I usually do for my yearly subscription. So, I get a message saying my system is not secured, even though my payment was processed a month before my yearly expiration date. This has happened the last two years. The first time, the program started working properly after about two weeks of getting the activation code error, and last year, I was told by Avast to insert my license code, which did work. This year my license code is not working, and neither is my activation code. So, I'm at a crossroads at what to do.avast seems to be the best option now they even announced last year that support will continue for it even after other antivirus said to upgrade to windows (including on so SP3)
Actually, the best alternative in my case was to not install any active virus/malware/ransomeware protection at all. In the past I've used a few of them, and they're all CPU hogs. My solution is backups. It doesn't matter if something catastrophic finds your HDD, if you can restore an image off an external drive thereafter.There aren't that many alternatives to choose from these days anyways.