Basically Windows 10 would not receive any more security updates. But that does not mean you cannot use it.

The best method is to install an internet security suite that covers anti virus and firewall.

Basically it replaces your windows anti virus and firewall.

Whatever comes from the internet it protected by firewall. Whatever gotten through is protected by anti virus.

You would be surprised that there are still people using Windows 7 today because they do not need to use the internet as much or at all.

If your Pc is working fine with windows 10 now, just add an internet security suite to it.

So far i have tried paid versions of Trend Micro Maximum Security, Kaspersky Standard & Avast.

All these are from cheap Shopee purchase. You could buy retail versions for full price if you like to hold a cardboard.