Windows Activation/trial

Windows 7/2008 currently comes with downloadable installer, but usage is limited to test purposes for 90-days.

However, there are options to extend this period. Use administrator privileged shell all the time to do this (start menu/run/cmd/right click - run as administrator)

Query current windows version:


Temporary official way to extend period:

Reinstall license:

Run a command line as administrator, and execute the following:

slmgr.vbs /rilc

Extend evaluation period with 30 days. You can use this 3 times max:

slmgr.vbs /rearm

If you're done with this 3 extensions, you can still extend the period by setting the registry key:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\SoftwareProtectionPlatform
set  SkipRearm to 1.

Now you can use the rearm 8 times (30 days each):

slmgr.vbs /rearm

Not-official way to do so...don't blame me if something goes wrong. This will disable the genuine check and will allow updates as well:

net stop sppsvc

locate C:\windows\system32\slui.exe

Change owner to administrator

Give administrator full control

rename to __slui.exe

Do the same with 


net start sppsvc