Hi again.
You have been trying to fix this Avatar issue for 7 days now, and have been back to the shop without the computer at least once or twice in the duration. It sounds like you are putting yourself through an enormous amount of stress going round and round on this. Would it not be so much simpler to bring your computer back to the shop and let him take 30 minutes to fix it for free?
If you choose to take it back to him, you do not need to take your entire computer with you. You can leave you monitor, printer, keyboard, mouse and any other peripherals at home. The only part you need to bring to the shop is the tower (the box as some call it).
If your end goal is to have an excuse to mess around with the computer just to learn something, then ignore everything I said. Good luck and God Bless You.
Bernclay-