In my experience, the best cracked launcher is UltimMC, it's MultiMC but with cracked accounts support.
If you want a completely free alternative, you can use the Minecraft server on a old computer and playit to access it from outside your network. It's harder to set up but it's free.
I have a netbook with the same CPU and it works, but there are no GPU drivers, even on Windows for x64
Super Mario Flash, a Sonic fangame and a game you had to help soneone to take care of the environment and be happy