What end of support means
Since 14 October 2025, Windows 10 no longer gets free security updates or technical support from Microsoft. The PCs still start and run, but each new vulnerability stays open. That matters for insurance, client due diligence and Cyber Essentials, which expects supported, updated operating systems.
Option 1: upgrade to Windows 11
If the hardware meets Windows 11 requirements, including TPM 2.0 and a supported processor, upgrading is usually the cheapest route. Check line-of-business software and printers first.
Option 2: pay for Extended Security Updates
Microsoft sells Extended Security Updates for businesses for up to three years, with the price rising each year. It buys time, not a fix. Use it for machines you genuinely cannot replace yet.
Option 3: replace the PCs
Older machines that cannot run Windows 11 need replacing. Before buying high-spec desktops for everyone, check what staff actually run. If the heavy software can live somewhere else, cheaper devices are fine.
Option 4: move the apps onto a hosted desktop
A hosted desktop runs your applications and data in a UK data centre on a supported, managed platform. Staff connect from Windows 11 PCs, Macs or thin clients. The device still needs to be supported and updated, but it no longer has to be powerful, and Sage or case files are not stored on it.
A sensible order
List every PC and what runs on it. Upgrade the ones that can be upgraded, use Extended Security Updates only as a bridge, and use the change to decide whether the software should stay on local machines at all.