Home > Installation, Mods and hacks, Tutorial, Win 7 > Installing Windows 7 – Part 4

Installing Windows 7 – Part 4

September 7, 2010 Leave a comment Go to comments

Note : This post is for Educational and Informative purposes only.

Scenario : You wonder what is the Unlimited Activation hack for Windows 7.

Solution : As mentioned before, after installing Windows 7 without a product key for activation, Windows 7 operating system will run in Initial Grace Period license status, which lasts 30 days as evaluation or trial period. When the initial 30-day activation-free grace period expires, users can rearm Windows 7 for additional 30 more days of activation grace period, for up to 3 times, effectively allowing Windows 7 to run legally for 120 days without a genuine product key to activate the system.

When a user uses up all three rearms available , the only option left is to enter a legit and genuine product key to activate Windows 7, or Windows 7 goes into non-genuine status. Through a vulnerability in Windows 7, it’s possible to reset the remaining rearm count back to 4. This ability to reset the rearm count for as many times as possible (until patched by Microsoft)  can allow users to run Windows 7 forever, without the need of activation or cracks.

The vulnerability is related to a registry key which contains Last Rearm Time information in Windows 7. When the registry key is deleted, the whole licensing status of Windows 7 is re-initiated to the Initial Grace Period,  as if Windows 7 is just installed. The key is :


With the obvious importance of this registry key, it’s understandable that the key and all its sub-keys have been locked from being changed, modified, removed or deleted under normal circumstances(i.e. you cannot change from a normal working windows environment). So this is where we get Smart…………..we run the command to delete that registry key manually from Windows Recovery Environment.

Now i will give you a very Simple walk-through to make this as easy as possible :

  1. Create a batch script file with the following commands (This Script loads the relevant key and deletes it) :

    reg load HKLM\MY_SYSTEM "%~dp0Windows\System32\config\system"
    reg delete HKLM\MY_SYSTEM\WPA /f
    reg unload HKLM\MY_SYSTEM

    Save the file as Unlimited.bat on drive C:\ ( or wherever your Root Windows Drive is).

  2. When there is ‘1‘ day remaining to activate Windows 7 , start the computer.
  3. Press F8 on boot to get to the “Advanced Boot Options”.
  4. Select Repair Your Computer.
  5. Select your keyboard input method, and click Next.
  6. Enter user name and password login credentials, and click OK.
  7. In the “System Recovery Options”, open Command Prompt.
  8. Type C: to go to the main drive(as applicable), and the execute the Unlimited.bat file by type its name:Unlimited.bat
  9. The console should display messages saying that the commands were executed successfully. Close the console window and reboot the machine.
  10. After system startup, sign into Windows. System will display message such as “This product is not genuine”. Just ignore it.
  11. Run Command Prompt as administrator, and execute the following command to re-insert the default Windows 7 product key into the system. These product keys will give you a trial period of 30 days and 3 more re-arms……120 free more days.
    Note that the command should be run according to the installed Windows 7 edition :   slmgr/ipk  “Your KEY”
    ( Ultimate : D4F6K-*****-*****-*****-***** Professional : HYF8J-*****-*****-*****-***** Home Premium: RHPQ2-*****-*****-*****-***** Home Basic: YGFVB-*****-*****-*****-***** Starter : Q28W-*****-*****-*****-***** )
    ( I will not provide the keys…only the first four characters…..Remember Google is your Friend…;)  )
  12. Reboot the computer.
  13. Login, and the Windows 7 OS is now in initial grace period of 30 days.
  14. To check the activation status and to rearm Windows 7, Check my Previous Post.

Advantage of this method : Resetting the count back to default is better than cracks as Windows 7 will forever run in Initial Grace Period license status, which is deemed genuine by WGA validation.Also, there is no modifying or changing of imp system files.

The only disadvantage of this method is that you have to reset the count every 30 days. And every 120 days you have to reboot the computer into Windows Recovery Environment to perform the simple command

  1. Anon
    September 8, 2010 at 10:59 pm

    Nice Trick……Like it…..

  2. urjklipon
    April 3, 2011 at 8:46 pm

    Awesome Trick!!!!

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