Because there can be some difficulty figuring out how to get your machine to do a legacy boot from a USB stick to run ReadSpeed or SpinRite, you might have struggled. If you did struggle, but eventually figured out the steps, please share the wealth here. Post your motherboard model or OEM machine model to help others search to find and figure it out. On the other hand, if you definitely learned it can't be done, there is another thread here where you can list those machines. If you're simply not sure, please ask for help to figure it out, don't start with a post in one of these two threads unless you KNOW it works or does not work.