Microsoft Windows Download Images
Windows ISO Images
There are several direct download links for windows and other products, currently up to Windows 7 on these sites:
msft-dnl.digitalrivercontent.net msft.digitalrivercontent.net azcdn01.digitalrivercontent.net
Installation Keys
From heidoc.net (see link below):
Install now, Activate later
In previous versions, it was possible to install Windows without key, run it as trial for up to 120 days, and enter a product key later. This option on first sight seems to have been removed in Windows 8.
However, it's still possible to pre-install Windows 8 or Windows 8.1 with a generic key. These keys can only install Windows. It's not possible to activate it unless you enter an original key purchased from Microsoft. Here they come...
XKY4K-2NRWR-8F6P2-448RF-CRYQH (Windows 8 Professional) RR3BN-3YY9P-9D7FC-7J4YF-QGJXW (Windows 8 Professional with Media Center) FB4WR-32NVD-4RW79-XQFWH-CYQG3 (Windows 8 [Home]) XHQ8N-C3MCJ-RQXB6-WCHYG-C9WKB (Windows 8.1 Professional) GBFNG-2X3TC-8R27F-RMKYB-JK7QT (Windows 8.1 Professional with Media Center) 334NH-RXG76-64THK-C7CKG-D3VPT (Windows 8.1 [Home])
If you can get hold of the installation disk, you can use these keys to install now, and purchase an activation key after 4 months. The Windows 8 and Windows 8.1 Setup Tools
If you have a valid Windows 8 or 8.1 product key (it used to work for all keys, but now there seem to be some restrictions), you can produce an iso file using the Windows 8 Setup Tool. Download and execute the file Windows8-Setup.exe from Microsoft, enter your product key, and have the tool download the Windows 8 or 8.1 setup files. The tool will then be able to compile an iso file or bootable USB stick from the download. This procedure however has some restrictions, as it will determine the language and bit edition of the download from the system on which it is executed, and doesn't allow to change these parameters.
Sites Monitoring Download Links
http://www.heidoc.net/joomla/technology-science/microsoft/70-windows-8-direct-download-links