How to extend free trial period of Windows OS


In this article I will explain the step by step methods to extend the free trial period of Windows 7 operating system which is initially set to 30 days. Using the following methods you can extend the free usage period up to 360 days.

First of all I would like to suggest you to not format your PC and reinstall OS until it is really necessary. If you are facing issue with performance of your PC go for easy tweaks like:

  • Uninstalling unnecessary programs.
  • Cleaning up unused files and data.
  • And several others you can search online.
The reason is that after you reinstall the OS, you need to find out all important application drivers and install them back. All programs are wiped away so you need to install them all back, and perform all the tweaks again to get back your PC like what you wanted.
Doing all this is really time consuming and cumbersome.
However if you format your PC and reinstall the OS and then feel like you can't find the product key for activation. No worry! Read on.

Lets first have a look on how to find Windows OS Product Key


A product key is a 25-character code and the format is:
PRODUCT KEY: XXXXX-XXXXX-XXXXX-XXXXX-XXXXX , and the location of your product key depends upon the following:
  • If you bought it from a retailer then you can find it on a label or some card inside the box that Windows came in.
  • If you have a new laptop running then you can find it written on a sticker on the back of your laptop.If you purchased a digital copy online then the product key will be in the confirmation email you received after the purchase.

But if you've still been unable to find your product key


Windows offers you 30 days of free trial. After enjoying it you need to activate your OS using product key. If you do not activate, then right after booting up you'll see several windows popping up on the screen one after other asking you to activate OS. But sadly you don't have one, so there is a simple method which can reset the trial period again to 30 days.

Extending the free trial period


  • Go to: All programs->Accessories->Command prompt
  • Now run the command prompt as administrator.
  • Type there: slmgr –rearm and click enter.
Now all you need is to restart your PC and then you'll find the trial period has been again reset to 30 days.
The problem is that this command can only be used three times so that you get to use your free trial for 120 days.

How to use slmgr –rearm command for 8 more times


Type regedit on the search programs and files tab and click enter and then run the program to open registry editor then follow the following steps.
  • On the left side pane go to:
    HKEY Local Machine->Software->Microsoft->Windows NT->
    Current Version->Software protection platform.
  • Now on the right side pane find out SkipRearm
  • Right click on it and select modify and change value data to 1.
Now this way you can use the slmgr –rearm command for eight more times, which can extend your free trial period for up to 360 days.
This tweak may or may not work with other versions of Windows. If you need to try this trick with any other version of windows, do post your result as comment below.


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