How To Legally Extend Microsoft Windows Trial Software

Need more time to evaluate one of Microsoft’s operating systems? There is a small command you can run that will extend your evaluation trial of a Windows from 30 days to 120 days.

DISCLAIMER: Even though the idea sounds a little suspicious, this is not circumventing evaluation terms of service since it is documented in Microsoft’s TechNet articles and blogs.

Check Current Evaluation

To check how many days you have left on your evaluation trial, you will need to open an elevated command prompt. (Must be running as an Administrator) Now verify that you want to give the program administrative access. When Command Prompt is displayed, it should show “C:\Windows\system32 >”, now type one of these following commands:

  • slmgr /dli
  • slmgr /dlv
  • slmgr /xpr

Extend Evaluation

Once again open an elevated command prompt window. Note: (“Must be running as an Administrator”)  Verify that you want to give the program administrative access. When Command Prompt is displayed, it should show “C:\Windows\system32 >”, now type the following command:

 slmgr /rearm

After a couple of seconds, you will see a prompt saying that the command has completed successfully and to reboot the system.

After you see that dialog, you need to reboot the system to see the results. After rebooting the computer, you will now notice that you have another 30 days to try it out when you go to your computer’s properties.

Note:  you can only do this three more times. At the end of the third time, you cannot use this method and you are required to purchase a Windows license from Microsoft.

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