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Jeff Atwood over at Coding Horror tells you how to legally evaluate Vista for 120 days (instead of the standard 30) before entering a product key.

When you install without a product key, you get an automatic 30 day evaluation period.* This probably isn't news to anyone.

What may be news to you, however, is that you can easily extend the 30-day Windows Vista grace period to 120 days. No hacks required. This is an official, supported operation directly from Microsoft.

To extend the grace period another 30 days, simply start a command prompt as Administrator, and issue this command:

slmgr -rearm

He has more, including reminding you to re-boot after doing this, and letting you know how to buy Vista and how much it's going to cost you.

As they say, read the whole thing.

Posted on Tuesday, April 3, 2007 2:10 PM Microsoft OS | Back to top


Comments on this post: "slmgr -rearm" -- Or, Extending the Windows Vista Grace Period to 120 days

# re: "slmgr -rearm" -- Or, Extending the Windows Vista Grace Period to 120 days
Requesting Gravatar...
Sadly, It seems like doesn't work already by some windows patche. I have tested with my PC installed Vista Home Basic.
Left by TAKA on Apr 06, 2007 7:54 PM

# re: "slmgr -rearm" -- Or, Extending the Windows Vista Grace Period to 120 days
Requesting Gravatar...
unfortunately: it aint doin non: with vista home basic:
Left by tvo on May 03, 2007 5:18 AM

# re: "slmgr -rearm" -- Or, Extending the Windows Vista Grace Period to 120 days
Requesting Gravatar...
re: "slmgr -rearm:

When I enter this command at the command prompt it brings up a document in Word which seems to contain windows virtual basic script.
The command itself is not executed.
How do I activate virtual basic?
Left by Jan Klaver on May 30, 2007 6:50 AM

# re: "slmgr -rearm" -- Or, Extending the Windows Vista Grace Period to 120 days
Requesting Gravatar...
its slmgr /rearm
Left by christian on Sep 26, 2007 10:08 PM

# re: "slmgr -rearm" -- Or, Extending the Windows Vista Grace Period to 120 days
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download vista
Left by jrr on Nov 03, 2007 5:47 PM

# re: "slmgr -rearm" -- Or, Extending the Windows Vista Grace Period to 120 days
Requesting Gravatar...
must be run as Admin
and or user control off
have fun
Left by zen on Jan 26, 2008 3:25 PM

# re: "slmgr -rearm" -- Or, Extending the Windows Vista Grace Period to 120 days
Requesting Gravatar...
It's not working on my machine. I guess "Windows updates" "fixed" rearming.
Left by EdijusXP on Feb 29, 2008 10:04 AM

# re: "slmgr -rearm" -- Or, Extending the Windows Vista Grace Period to 120 days
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My copy of Windows Vista is now permanently activated. I did the slmgr -ato and it Activated Windows as it said; then I did slmgr -xpr and it now says "This machine is permanently activated.
Left by wangtangkiki on May 12, 2008 11:53 PM

# re: "slmgr -rearm" -- Or, Extending the Windows Vista Grace Period to 120 days
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I found I had to use slmgr -rearm to get Vista SP2 to install without any errors.

It was installing to 100% then &£%$*^!?! it said that the install had failed and would now roll back... reboot and surprise!! Windows wants you to update to SP2!!!

Tried everything - Safe mode - Disabling services / startup items

slmgr did it!
Left by Tim Birkett on Jul 02, 2009 10:17 AM

# re: "slmgr -rearm" -- Or, Extending the Windows Vista Grace Period to 120 days
Requesting Gravatar...
its easy like 1 - 2- 3

run cmd as administator , type slmgr -rearm , and reboot

works perfect with windos seven
Left by Alien Man on Sep 13, 2009 10:50 AM

# re: "slmgr -rearm" -- Or, Extending the Windows Vista Grace Period to 120 days
Requesting Gravatar...
updated my pc windows vista
Left by masoud mbaruk said on Mar 16, 2010 11:37 AM

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