Start a new Windows update Install fresh version of the operating system
Start a new Windows update Install fresh version of the operating system
You can perform a clean installation by booting from the USB drive and replacing the existing OS on your SSD. Since you've backed up all your data, this process will erase everything on the current system and install Windows 8.1 Pro fresh.
You retain the same serial number after a clean install with the activated copy.
That's accurate. Generally, when you activate your license, the old one will turn off automatically. Windows handles it all—no need to worry.