Running Linux from a USB drive is possible. You can boot just about any distribution you want from USB. There are some things you should consider before going this route. I've used Linux in just about ...
Repairs, surfing, virus check, complete system? The fact that a large USB stick offers space for 50 live systems should not tempt you to use it haphazardly. It’s all about making the right choice!
You can revive your aging PC with a lightweight Linux distro such as Puppy Linux and Linux Lite. But which one should you choose?