I'm running Build 16278 w/out any issues, other than the ESET Banking & Payment browser won't open. Am thinking that maybe it's not quite compatible yet, as with a prior upgrade that had to be rolled back, ESET Smart Security wasn't working at all (the active protection modules).
This is leading me to believe that Microsoft is attempting to force their security, just as they're on Windows 10 S Preview, globally. The AV/IS industry will fight this all the way to the highest Court in every nation, Kaspersky has already been an outspoken critic of this tactic. Windows Defender is not adequate protection for everyone, I've tried it several times, doesn't block Malware loaded Web pages like Malwarebytes & ESET does (I run MBAM for AM protection, ESET for AV & Internet Security). I believe the breakage of security is intentional on the part of Microsoft, up to the point of the Creator's Update, have ran the 1-2 punch of MBAM & ESET for years, going back to the XP SP3 days, w/out issues.
Microsoft is breaking Fair Trade laws (in the US) in cramming Windows Defender down everyone's throat. We have an exclusive right to pick & choose our own security, not to mention they're attempting to decimate an industry. Check out the AV-Comparatives site for more detail, Windows Defender is baseline protection, blocking up to 90% of threats & that's a very generous figure. On a test machine, I was able to travel freely until the install was so infected that there was no other choice except to revert to a clean backup image taken prior to the test cruise. No 3rd party tool could totally cleanup the mess left behind, to put it in perspective, one Microsoft Edge page after another was opening in the background (each loaded with ads), things quickly got to the point to where only a forced shutdown could stop the madness.
And Microsoft says that Edge is 'safer' than Google Chrome? Not even close.
So how could their security be superior to traditional offerings?
Cat