Windows 10S...as useful as a chocolate teapot
"Dixons hits back at McAfee's £30m antivirus sueball: Your AV didn't work on Windows 10S"
Nothing works on Windows 10S.
Luckily it's easy (and free) to convert to Windows 10 Pro, or "switch out of S mode" as Microsoft describes it. Anyway, Windows Defender is fine IMHO.
Weird thing about this is that DSG employees were obviously trying to install the AV software manually to "add value" (i.e. squeeze a few more quid out of the consumer), as laptop makers wouldn't ship a laptop with non-working AV.
The fact that DSG tampers with new laptops to install their crapware has always annoyed me, and is reason number 763 why I wouldn't buy as much as a USB key from them...