need assistance - possible problems with a windows 7 pc, using firefox

[Kali]

6. no little shield

he can try setting/update when he sees this

I think it is called Defender for 10, but I have the exact same computer and mine is a little castle with a flag and still called ms Security Essentials. I don't know why it doesn't seem to be on his, didn't it come with 7 automatically? I just do not remember downloading it or not.

as mentioned in previous discussions, I have it on a laptop and never use the laptop because I like 7 and am too lazy to even figure out what 10 is about. and he should probably get rid of whatever is wrong with his machine before trying to update anyway, shouldn't he?