Because of the overloaded Microsoft servers it can be hard to get a valid key. To get a valid key the fastest just follow these simple steps.
Thanks to my friends over at Tweakers.NET for finding this solution
Update : It seems that it’s a little busy over at the Microsoft Product Key Servers
Step 1 : Logon to http://technet.microsoft.com (click on Sign in in the upper right corner)
Step 2 : Copy (Don’t CLICK IT!) one of the links below to the address bar and press enter :
32-Bit key : https://www.microsoft.com/betaexperience/scripts/gcs.aspx?Product=tn-win7-32-ww&LCID=1033 (don’t click, Copy and Paste!)
64-bit key : https://www.microsoft.com/betaexperience/scripts/gcs.aspx?Product=tn-win7-64-ww&LCID=1033 (don’t click, Copy and Paste!)
Tip : You can use the 64-bit during a 32-bit installation and a 32-bit key during a 64-bit installation (it seems that getting a 64-bit key is faster!)
Step 3 : If you receive the error below, just press F5 to refresh (I had to refresh more then 10 times before I received the key), if you’re being redirected then you didn’t follow the steps 1 and 2 correctly!
If you followed the steps correct you should see your key (depending on your version it could also say Windows 7 Beta 32-bit Product Key ). Have fun!