im using an HP Elitebook 840 G3 that I found in my dad’s tech junk pile. Basically when i first used it, it was locked by my dad’s employer, and it was asking for a security code or something like that. Luckily, they didnt lock the BIOS so I managed to install Windows 10 on it( the most recent version that was supported on it) and i basically restored apiece of junk. It runs youtube and codecombat fine, although it can get laggy when there are a lot of applications open, but other than that, hey, its a free computer.