I read that you should use Acronis to backup your computer before you install anything on it. I just received a computer from Velocity Micro and I want to start installing programs on it. Can I use the free trial download to do the backup thing? I want to buy the software because I've heard it's good but I don't have the money right now and I need to start installing things on my new PC. I only have one hard drive in the computer and I don't have an external hard drive either. Can I use DVD+R to do the backup?