I have had the exact same problem since last week, specifically Thursday evening UK time. Chrome, Firefox and Edge crash and don't function properly with real time protection turned on. They are slow, unresponsive and eventually freeze. Sometimes they start OK and run for a few minutes but then they stop responding. System resources are at a very low level during this time cpu 1%, low memory, GPU and disk access so its not overloading anything. You cannot kill the last chrome process from within task manager so the only solution is to reboot. This has almost driven me crazy to the point I spent 5 hours yesterday reinstalling windows and a ton of programs only for it to happen again immediately. I am running premium Malwarebytes latest version on Windows 10 home latest version. I also tried creating a new user in Windows, creating a new user in Chrome, memory test, disk test, reinstalling chrome several times, disabling all chrome extensions, reinstalling all the drivers I could and as I said above eventually reinstalling Windows when I felt there was no other option left. This has caused me 4 days of hassle and I spent Thursday night, Friday night, most of Saturday and Sunday morning trying to diagnose this. MBAM does not report anything and looks like it is running normally, the windows error log just says "Chrome stopped interacting with Windows and was closed". I am also running Sophos anti virus if this helps. This whole experience has been extremely frustrating and wasted a lot of time. I won't be renewing when my subscription expires.