Seems you can download from those links. It says it is the RTM versions of Windows. Which as I understand
are the versions first released to manufacturers.
Not exactly a trial period....you will be allowed 30 days to activate with a key you now own or you will need to purchase a product key
from Microsoft. After thirty days and no activation, your OS will turn into a pumpkin.
If you do decide to download from one of those links, please post back your experience as to installing and ability
to update. Just curious. Like a cat.
But if you intend to purchase, it would be better to get the software from Microsoft or purchase for usually few dollars
less from another vendor such as Newegg, a Windows DVD.