How to Activate Windows 7 for Free

1)Run notepad as administrator (to Run as Administrator Right click on Notepad and click on "Run as Administrator") and paste the code below:

reg load HKLM\MY_SYSTEM "%~dp0Windows\System32\config\system"
reg delete HKLM\MY_SYSTEM\WPA /f
reg unload HKLM\MY_SYSTEM
Then save it with name delwpa.bat as type "all files" on drive C:\ at the root level (directly under C).

2) Restart the machine and press F8 right after the BIOS screen to get to the Advanced Boot Options.

3) Select Repair your Computer, select your Input language, enter your Login details and Open Command Prompt.

4) Type C: to go to the main drive. Then type dir to get the list of files where you should see the file delwpa.bat created in Step 1).
Execute the file by typing it:
delwpa.bat

The console should display messages saying that the commands were executed successfully. Close the console window and reboot the machine.
NOTE: When testing on a Virtual Machine the C: drive appeared as D:, but for a real machine it should normally be C: (as tested). Other users also reported that the .bat file was located in D: drive. If you can't find the .bat file on C: then you just have to find the drive containing it. Type D: and then dir so see if it's located there. If you're not lucky then try with E:, etc, etc.

5) Back on Windows: login and don't worry if the desktop shows a message like "This product is not genuine". Just ignore it.
Run Command Prompt as administrador, and execute the following command depending on your Windows 7 version:
Ultimate:
Code:
slmgr /ipk D4F6K-QK3RD-TMVMJ-BBMRX-3MBMV
Professional:
Code:
slmgr /ipk HYF8J-CVRMY-CM74G-RPHKF-PW487
Home Premium:
Code:
slmgr /ipk RHPQ2-RMFJH-74XYM-BH4JX-XM76F
Home Basic:
Code:
slmgr /ipk YGFVB-QTFXQ-3H233-PTWTJ-YRYRV
Starter:
Code:
slmgr /ipk 7Q28W-FT9PC-CMMYT-WHMY2-89M6G
Then perform a final reboot on your machine.

6) After the reboot, check that everything is alright by running a command prompt as administrator and executing:
slmgr /dlv

Wait for a few seconds and you should get a window with lots of data. This is what we're interested in:
License Status: Initial Grace Period
Time remaining: 30 days
Remaining windows rearm count: 4


And that's it! Just like a brand new windows. Now all you have to do is wait 30 days, execute a simple rearm and you'll be fine. A future simple rearm will add another 30 days to the grace period. The command for a simple rearm is:
slmgr /rearm
(remember to always run the command prompt as administrator).

VERY IMPORTANT: Windows will let you do a rearm 4 times only, meaning that you will have a maximum of 120 days Grace period. After those 120 days you should follow the Guide again to reset the rearm count. If you decide to always keep the delwpa.bat file on your computer, then all you need to do is follow steps 2-6.
If You Want any Help
If you want any further assistance then do not hesitate to comment below. I 'll be responding there as early as possible to help you out :-)
Author of this Post is Abdul Hanan.
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