Re: I didn't bother with a third party anti-virus for Win10
....is this bad?
Windows 10 has so many malware like features its truely difficult to discern the difference.
The problem is AV Vendors are also having a hard time distinguishing the difference between real Malware and Windows 10 Anniversary Update's 'New features'. Technically, many properties of both forms of malware are the same, its just the MS ones are seen as 'official malware' that route Private data through MS Servers.
You could have exactly the same 'Windows 10 feature' i.e. installing an unrequested app (in the form of malware) routing exactly the same telemetry data through a third party server that would be flagged as malware under different circumstances, and there is your problem.