Datasheet

46 Chapter 1
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Planning for the Installation of Windows 7
The Windows 7 activation limit can be extended to a total of 120 days.
When the 30-day limit is reached, you can run
slmgr -rearm from an
administrator command prompt, which resets the activation limit for
another 30 days. This command can be executed three times. Thus, if it is
run at the end of each 30-day period, you’ll get a total of 120 days.
Activate Windows
You can use slmgr /ato command to cause the system to activate right away. As a reminder,
activation won’t normally be done until three days after the user first logs on. If you are
building computers that you’ll move to an isolated environment without Internet access,
you can use this command to force activation right away.
Display License Information
The slmgr /dli command can be used to display information on the license used for this
system. When executed, it will show the name, description, a partial product key, and the
license status of the current license. As an example, Figure 1.12 shows what it looks like on
one of my systems:
FIGURE 1.12 Displaying license information
You can also execute it as slmgr /dli all to display information on all licenses on the
system. Other licenses will indicate they are not in use and the status is Unlicensed.
Install Product Key
The slmgr /ipk <Product Key> command can be used to install a new product key. This can
be useful if the system is configured to use a KMS but you want to switch it to use a MAK.
Display Detailed License Information
You can use the slmgr /dlv command to get more detailed information on the license. The
result includes several identification numbers and certificate URLs. It will also show the
status of the license and the remaining rearm count.
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