Windows 8.1 was made available for download via MSDN and Technet and available as a free upgrade for retail copies of Windows 8 and Windows RT users via the Windows Store. It was released to manufacturing on August 27, 2013, and broadly released for retail sale on October 17, 2013, about a year after the retail release of its predecessor, and succeeded by Windows 10 on July 29, 2015. In some releases of Windows Server, you can also freely convert between original equipment manufacturer (OEM), volume-licensed, and retail versions with the same command and the appropriate license key.Windows 8.1 is a release of the Windows NT operating system developed by Microsoft. However, when you convert your edition from Standard to Datacenter, there's no way to reverse the process to return to Standard edition. For example, if your server is running Windows Server Standard edition, you can convert it to Windows Server Datacenter edition. All you have to do is run a command and enter the appropriate license key for the edition you want to convert to. License conversion converts a particular edition of a specific version of Windows Server to another edition of the same release. You can migrate your system components to a new machine that's either running the same version of Windows Server as the source computer or a later version than the source computer. This process is gradual, moving one role or feature at a time, without upgrading them. Migration is when you move roles or features from a source computer running Windows Server to a destination computer that's also running Windows Server. For more information, see Cluster OS rolling upgrade. For example, if nodes in your clusters are running an earlier version of Windows Server, your admin can use a rolling upgrade to install a later version on them without having to turn off the cluster, which would otherwise affect Service Level Agreements. The Cluster operating system rolling upgrade gives an administrator the ability to upgrade the operating system of the cluster nodes without stopping the Hyper-V or the Scale-Out File Server workloads. In-place upgrades work best with virtual machines (VMs) that don't need specific Original Equipment Manufacturer (OEM) hardware drivers to upgrade successfully.įor step-by-step instructions for how to perform an in-place upgrade, see Perform an in-place upgrade.įor more information about how upgrades work, see the Windows Server upgrade overview.įor more detailed guides for how to upgrade for different versions of Windows Server, including information about which roles and features support in-place upgrades, see Upgrade and migrate roles and features in Windows Server. Keep in mind that some roles and features don't support in-place upgrades. For more information, see Which version of Windows Server should I upgrade to?. ![]() You can upgrade between up to two Server versions at a time. In-place upgrades let you upgrade to a later version of Windows Server while keeping your original settings, server roles, features, and data. ![]() You should also make sure your system meets the hardware requirements for Windows Server. However, before you can do a clean install, you must back up your data and plan for how to reinstall your original applications. Clean installĪ clean install, where you install a blank server or overwrite an existing operating system (OS), is the simplest way to install Windows Server. You can download and try Windows Server free of charge at Windows Server Evaluations.
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