Linux
Yep, Linux. I just took my old very slow running windows desktop and wiped it clean, installed Linux/Ubuntu on it, now runs like new in my garage for looking up parts/fixes to household stuff.
I did the same to my wife’s she never uses laptop because it is too slow. That is running fast again.
No security software to buy.
My husband keeps telling me to use bit defender on my linux cinnamon desktop...I don’t need it do?