You might want to play around with the newly realeased Windows 7 but the sad thing behind it is that it will expire after 30 days. How about a easy hack to reset the activation expiry date twice in Windows Vista Pre-Beta and fortunately it’s the same for Windows 7 too.

Step-by-Step Instructions

1. Download Windows 7 Pre-Beta (Mininova | Despositfiles | Piratebay).  and burn the ISO to a DVD.

2. Install Windows 7 Pre-beta using the DVD (Make sure you don’t insert any activation key during installation.)

3. As soon the installation process is over, open your Command Prompt.

4. Insert the following set of commands.
sysprep /generalize or slmgr.vbs –rearm or rundll32 slc.dll,SLReArmWindows

5. After that, just a click on the ENTER key.

6. Reboot Windows 7 and happily explore another exciting 30 days of free trial. (BTW, This is magic hack will work only 2 times, so use it wisely).