Hi, I am planning to upgrade my motherboard from the Gigabyte GA-B85-HD3 to the Gigabyte GA-Z97P-D3. I have Windows 10 Pro and it is currently activated (I upgraded from Windows 8.1 and I paid around £120 for it) Once I have inserted my new motherboard and power my computer on what will happen and will I need to reinstall windows?? Please help, I am new to PCs and I am quite worried!!