I am going to build a new PC and would like to move my Windows 8 upgrade license to the PC. I want to buy an SSD as the boot drive but use my current HDD for files. I have Windows 8 on my HDD and I have my upgrade license key. Will I be able to transfer Windows 8 to the SSD and use the same key?

If I need Windows already installed: I have a Windows vista 32bit disk and license. My problem with this is that it's 32 bit and I'd like to have Windows 8 64 bit. When downloading Windows 8 from the site and installing it, will I have the option to install the 64bit OS? How would this be done?

Last question, will my upgrade license work twice or would I have to contact Microsoft by phone to use the key?

To install an upgrade version of Windows 8, you must already have Windows 7, Windows Vista, or Windows XP installed on your PC.

If you formatted the drive before the upgrade version of Windows 8 was installed, you won't be able to use your upgrade product key to activate Windows 8. To activate Windows 8, you'll need to install your previous version of Windows, and then reinstall Windows 8. For help with the activation process, contact support.

So you will need to reinstall WIndows Vista on the new SSD and then do a custom install of Windows 8 over the 32 bit Vista installation.