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Operating System Software

Operating system software gives your PC the core platform it needs for apps, security updates and everyday tasks. Choose Windows 11 Home for day-to-day personal use, Windows 11 Pro for extra business features, or Windows Server for selected server setups. Compare electronic downloads and DVD licences, then check the edition, device count and hardware needs before you buy.

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Choose operating system software for the way you use your PC

Start with the edition that suits your needs. Windows 11 Home covers everyday tasks, entertainment and gaming. Pro adds features aimed at work and business, including BitLocker Drive Encryption, Remote Desktop and support for joining a domain or Microsoft Entra ID. That can make Pro more useful for work PCs or users who need extra control.

Check your PC before buying Windows 11 software

Compatibility matters, especially when upgrading an older PC or building a new one. Windows 11 needs a compatible 64-bit processor with at least two cores, 4 GB of RAM and 64 GB of storage. Your PC also needs UEFI firmware with Secure Boot support, TPM 2.0 and DirectX 12-compatible graphics. Microsoft’s PC Health Check tool can help you check before you buy.

Pick the right Windows operating system licence and format

You’ll find both electronic downloads and DVD options, so check how you want to install your purchase. Windows 11 activation uses either a digital licence or a 25-character product key, depending on how it was bought. OEM licences are generally tied to the first PC they’re installed on, so they aren’t designed to move between machines. If you expect to replace your PC later, check the licence terms before ordering.

Frequently Asked Questions

Windows 11 Home suits most personal PCs. Windows 11 Pro adds tools aimed at work and business, such as BitLocker Drive Encryption, Remote Desktop and the ability to join a domain or Microsoft Entra ID. If you use your PC for business or need more control over security and access, Pro may be the more suitable choice. You can compare editions in our Microsoft Operating System Software range.
Check the hardware before buying. You’ll need at least 4 GB of RAM, 64 GB of storage and a compatible 64-bit processor with two or more cores. TPM 2.0 and Secure Boot support are also required. Microsoft’s PC Health Check tool is a simple way to see whether your current computer meets the main requirements.
An OEM licence is linked to the PC it was first installed on and normally can’t be moved to another machine. This is worth knowing if you plan to rebuild or replace your PC. Retail licences can have different transfer rights, so check the licence terms supplied with the product before buying. Licence transfers are a common issue when shoppers move Windows to a newly built PC.
The main difference is how you receive and install it. An electronic download gives you the files or instructions digitally, so you don’t need a disc drive. A DVD version uses physical installation media. Both still need the correct licence and activation method. For other Microsoft applications and downloads, browse Microsoft Software.
It depends on the licence type and edition. An OEM key is generally tied to its original PC. A retail licence may have transfer rights, but moving it can still require reactivation. You’ll also need the correct edition, such as Home or Pro. Check your existing licence before relying on an old key for a new build.
Once Windows is set up, you may also need productivity, security or other everyday programs. Browse our wider Software range to compare the available options.

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