Note: This is from an Eset Reseller so use your own judgement on this article.
This week, Microsoft issued the Windows 10 Anniversary Update, which changes the way in which security status is presented to home users.
Windows Defender now displays a user’s protection status as “off” if any non-Microsoft antivirus protection, including ESET, is in use. Additionally, Windows Defender advises the user to remove their non-Microsoft antivirus protection.
This is a very different stance to Microsoft’s position in the past, where Windows Defender played well with others, and if you ran ESET (or any other) antivirus with Windows Defender, they co-existed relatively well together. Computer Security Solutions always recommended turning off the real-time protection of Windows Defender, so that you didn’t have two programs scanning the same file when you accessed it – but leaving Windows Defender “on” for a “second look” during an overnight scan was not a problem. Even though we have never heard of Microsoft’s product finding something that ESET didn’t (quite the reverse) – we felt it was OK to leave Defender on “just in case”.
Well now that Microsoft has changed the way the defender works, our advice has to change – because Microsoft is going to recommend that you remove ESET (and any other 3rd-party antivirus), and keep their Windows Defender as a single product.