I installed a new SSD with a Windows in my computer

As the title says, I've installed an SSD in my PC. The problem is that the PC already has a storage drive with Windows installed on it. Now the PC has defaulted the new SSD (with old Windows that I don't need). What can I do? Can I just format the newly installed SSD?

Not sure but I would say try Tom's Hardware, I think they would provide better Support for an issue like this.