Im transplanting parts from an old rig into a new case and decided to change from a mini-itx to a micro-atx. I'm keeping the same CPU, GPU, HDD, and RAM. However, I've seen some conflicting reports about whether or not I will need to reinstall all of my programs (including the OS). Everything I have is stored on a single HDD so this has me a little confused. My current mobo and the new one both have the same chipset and socket, only the new one is just a 'size' larger. I understand I will have to download the new BIOS from the motherboard's website, but a clean reinstall has me unsure. Any help on this matter is appreciated.