So right now I have a HP Pavilion and the cpu is old and outdated. It is amd a6-3620 apu. Do you think I will be able to change the cpu in an HP computer?
You can change it but you'll have to look up the supported CPU list for your computer. I really wouldn't think it's worth upgrading an FM1 system but that's up to you, there's not really anything you can do to make it fast.