First thing I cleared all browser history, cleared all cache, reset to original settings and signed in to everything without problems, including CHR. I had clicked a "see more" link on FB earlier in the week and got the bells & sirens & flashing screen telling me not to shut down or it would blow up my computer, which took some hoop jumping to finally clear. Apparently it had left some tracks behind that was triggering my Malware Bytes. The key was that I could log on clean with my phone but not the laptop.

Sorry for the hassles, thanks for the responses!!