One thing, before you reinstall Windows, de-register your PC from your ConnStore account. The ConnStore may not recognize it as the same machine after the reinstall, it definitely won't if you have to swap the drive out.
If you've already done the reinstall, or you can't get the de-registration to go through, you can get Sony to remove the 'old' registration, but you'll have to call them to do so. It'll save you some time if you can do this beforehand.
