Windows activation is designed to be as foolproof as possible, so Microsoft’s graphical tools keep it simple. If you want to do something more advanced like remove a product key, force an online activation, or extend the activation timer, you’ll need Slmgr.vbs.
How to activate a Windows computer that is not connected to the internet If you are building a secure computer, then the best approach is to never connect it to the internet. If the operating system on this computer is Windows, then you will have to activate it before you will be able to use it. When I installed Windows Server 2008 I didn't have the (activation) key. Now that I have it I can't find where to enter it. Anybody know?
This command line tool is included with Windows, and provides options unavailable in the standard activation interface provided on the Update & Security > Activation screen in the Settings app.
First: Open an Administrator Command Prompt Window
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To use this tool, you’ll want to launch a Command Prompt with Administrator access. To do so on Windows 8 or 10, either right-click the Start button or press Windows+X. Click the “Command Prompt (Admin)” option in the menu that appears. On Windows 7, search the Start menu for “Command Prompt,” right-click it, and select “Run as Administrator.”
Note: If you see PowerShell instead of Command Prompt on the Power Users menu, that’s a switch that came about with the Creators Update for Windows 10. It’s very easy to switch back to showing the Command Prompt on the Power Users menu if you want, or you can give PowerShell a try. You can do pretty much everything in PowerShell that you can do in Command Prompt, plus a lot of other useful things.
View Activation, License, and Expiration Date Information
To display very basic license and activation information about the current system, run the following command. This command tells you the edition of Windows, part of the product key so you can identify it, and whether the system is activated.
To display more detailed license information–including the activation ID, installation ID, and other details–run the following command:
View the License Expiration Date
To display the expiration date of the current license, run the following command. This is only useful for Windows system activated from an organization’s KMS server, as retail licenses and multiple activation keys result in a perpetual license that won’t expire. If you haven’t provided a product key at all, it’ll give you an error message.
Uninstall the Product Key
You can remove the product key from your current Windows system with Slmgr. After you run the below command and restart your computer, the Windows system won’t have a product key and will be in an unactivated, unlicensed state.
If you installed Windows from a retail license and would like to use that license on another computer, this allows you to remove the license. It could also be useful if you’re giving that computer away to someone else. However, most Windows licenses are tied to the computer they came with–unless you purchased a boxed copy.
To remove uninstall the current product key, run the following command and then restart your computer:
Windows also stores the product key in the registry, as it’s sometimes necessary for the key to be in the registry when setting up the computer. If you’ve uninstalled the product key, you should run the below command to ensure it’s removed from the registry as well. This will ensure people who use the computer in the future can’t grab the product key.
Running this command alone won’t uninstall your product key. It’ll remove it from the registry so programs can’t access it from there, but your Windows system will remain licensed unless you run the above command to actually uninstall the product key. This option is really designed to prevent the key from being stolen by malware, if malware running on the current system gains access to the registry.
Set or Change the Product Key
You can use slmgr.vbs to enter a new product key. If the Windows system already has a product key, using the below command will silently replace the old product key with the one you provide.
Run the following command to replace the product key, replacing #####-#####-#####-#####-##### with the product key. The command will check the product key you enter to ensure it’s valid before using it. Microsoft advises you restart the computer after running this command.
You can also change your product key from the Activation screen in the Settings app, but this command lets you do it from the command line.
Activate Windows Online
To force Windows to attempt an online activation, run the following command. If you’re using a retail edition of Windows, this will force Windows to attempt online activation with Microsoft’s servers. If the system is set up to use a KMS activation server, it will instead attempt activation with the KMS server on the local network. This command can be useful if Windows didn’t activate due to a connection or server problem and you want to force it to retry.
Activate Windows Offline
Slmgr also allows you to perform an offline activation. To get an installation ID for offline activation, run the following command:
You’ll now need to get a a confirmation ID you can use to activate the system over the phone. Call the Microsoft Product Activation Center, provide the installation ID you received above, and you’ll be given an activation ID if everything checks out. This allows you to activate Windows systems without Internet connections.
To enter the confirmation ID you’ve received for offline activation, run the following command. Replace “ACTIVATIONID” with the activation ID you’ve received.
Once you’re done, you can use the
slmgr.vbs /dli or slmgr.vbs /dlv commands to confirm you’re activated.
This can generally be done from the Activation screen in the Settings app if your PC isn’t activated–you don’t have to use the command if you’d rather use the graphical interface.
Extend the Activation Timer
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Some Windows systems provide a limited time where you can use them as free trials before entering a product key. For example, Windows 7 offers a 30-day trial period before it begins complaining at you. To extend this trial period and reset it back to 30 days remaining, you can use the following command.As Microsoft’s documentation puts it, this command “resets the activation timers.”
This command can only be used several times, so you can’t indefinitely extend the trial. The number of time it can be used depends on the “rearm count,” which you can view using the
slmgr.vbs /dlv command. It seems different on different versions of Windows–it was three times on Windows 7, and it seems to be five times on Windows Server 2008 R2.
This no longer seems to work on Windows 10, which is very lenient if you don’t provide it a product key anyway. This option still works on older versions of Windows and may continue to work on other editions of Windows, such as Windows Server, in the future.
Slmgr.vbs Can Perform Actions on Remote Computers, Too
Slmgr normally performs the actions you specify on the current computer. However, you can also remotely administer computers on your network if you have access to them. For example, the first command below applies to the current computer, while the second one will be run on a remote computer. You’ll just need the computer’s name, username, and password.
The Slmgr.vbs command has other options, which are useful for dealing with KMS activation and token-based activation. Consult Microsoft’s Slmgr.vbs documentation for more details.
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Applies To: Windows Server 2019, Windows Server 2016
The following information outlines initial planning considerations that you need to review for Key Management Services (KMS) activation involving Windows Server 2019. For information about KMS activation involving operating systems older than those listed here, see Step 1: Review and Select Activation Methods.
KMS uses a client-server model to active clients. KMS clients connect to a KMS server, called the KMS host, for activation. The KMS host must reside on your local network.
KMS hosts do not need to be dedicated servers, and KMS can be cohosted with other services. You can run a KMS host on any physical or virtual system that is running Windows 10, Windows Server 2019, Windows Server 2016, Windows Server 2012 R2, Windows 8.1, or Windows Server 2012.
A KMS host running on Windows 10 or Windows 8.1 can only activate computers running client operating systems.The following table summarizes KMS host and client requirements for networks that include Windows Server 2016, Windows Server 2019 and Windows 10 clients.
Activate Windows Server 2008 Manually
Note
Note
Depending on which operating system your KMS server is running and which operating systems you want to activate, you might need to install one or more of these updates:
A single KMS host can support an unlimited number of KMS clients. If you have more than 50 clients, we recommend that you have at least two KMS hosts in case one of your KMS hosts becomes unavailable. Most organizations can operate with as few as two KMS hosts for their entire infrastructure.
KMS can activate physical and virtual computers, but to qualify for KMS activation, a network must have a minimum number of computers (called the activation threshold). KMS clients activate only after this threshold is met. To ensure that the activation threshold is met, a KMS host counts the number of computers that are requesting activation on the network.
KMS hosts count the most recent connections. When a client or server contacts the KMS host, the host adds the machine ID to its count and then returns the current count value in its response. The client or server will activate if the count is high enough. Clients will activate if the count is 25 or higher. Servers and volume editions of Microsoft Office products will activate if the count is five or greater. The KMS only counts unique connections from the past 30 days, and only stores the 50 most recent contacts.
KMS activations are valid for 180 days, a period known as the activation validity interval. KMS clients must renew their activation by connecting to the KMS host at least once every 180 days to stay activated. By default, KMS client computers attempt to renew their activation every seven days. After a client's activation is renewed, the activation validity interval begins again.
KMS activation requires TCP/IP connectivity. KMS hosts and clients are configured by default to use Domain Name System (DNS). By default, KMS hosts use DNS dynamic update to automatically publish the information that KMS clients need to find and connect to them. You can accept these default settings, or if you have special network and security configuration requirements, you can manually configure KMS hosts and clients.
After the first KMS host is activated, the KMS key that is used on the first host can be used to activate up to five more KMS hosts on your network. After a KMS host is activated, administrators can reactivate the same host up to nine times with the same key.
If your organization needs more than six KMS hosts, you should request additional activations for your organization's KMS key—for example, if you have ten physical locations under one volume licensing agreement and you want each location to have a local KMS host.
Note
To request this exception, contact your Activation Call Center. For more information, see Microsoft Volume Licensing.
Computers that are running volume licensing editions of Windows 10, Windows Server 2019, Windows Server 2016, Windows 8.1, Windows Server 2012 R2, Windows Server 2012, Windows 7, Windows Server 2008 R2 are, by default, KMS clients with no additional configuration needed.
If you are converting a computer from a KMS host, MAK, or retail edition of Windows to a KMS client, install the applicable KMS Client Setup Key. For more information, see KMS Client Setup Keys.
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