Windows 10 end of support arrived on October 14, 2025, and Microsoft is no longer issuing security patches, bug fixes, or technical support for the operating system. Devices running Windows 10 have not stopped working, but they have stopped being protected, and every new vulnerability found from this point forward stays open unless the business moves to a supported version of Windows.
That’s the problem a Windows 11 compatibility check is built to solve: knowing which devices are ready, which need changes, and which need to be replaced, before a gap in coverage turns into a real incident.
Why Unsupported Devices Are a Security Risk
Once Windows 10 end of support takes effect, Microsoft stops releasing the monthly security updates that patch newly discovered flaws. Hackers know this, and unsupported operating systems become a preferred target because the holes they find never get closed.
Running unsupported Windows 10 machines creates a few specific risks for a small business.
- No new patches. Any vulnerability found after October 2025 stays exploitable indefinitely, since Microsoft is no longer releasing fixes for Windows 10.
- Vendor support gaps. Business software and hardware vendors are phasing out support for Windows 10 alongside Microsoft, widening the compatibility gap over time.
- Compliance exposure. Businesses that handle regulated data face added risk, since several compliance frameworks expect current, supported operating systems.
- Higher breach risk. Malware, ransomware, and data breaches increasingly target known, unpatched flaws in operating systems that no longer receive updates.
None of this means an unsupported PC fails immediately. It means the odds shift, and they keep shifting in the wrong direction the longer a device stays on an unsupported system.
How to Check Windows 11 Compatibility
Before you can plan a Windows 11 migration, you need a clear picture of which devices qualify. Windows 11 has firmer hardware requirements than past upgrades, including a compatible 64-bit processor, 4 GB of RAM, 64 GB of storage, UEFI firmware with Secure Boot, and a TPM 2.0 security chip.
That last requirement trips up a lot of older business PCs. Plenty of machines bought even four or five years ago either lack a TPM chip or have one disabled in the firmware settings, which is why a device-by-device check matters more than assuming your whole fleet is fine or assuming it all needs replacing.
A proper Windows 11 compatibility check should tell you three things: which machines are ready today, which ones need a firmware or settings change to qualify, and which ones will need to be replaced. Guessing wrong in either direction costs money, either from an unnecessary hardware refresh or from limping along on unsupported machines longer than you should.
What a Windows 11 Migration Involves
A migration is more than clicking “upgrade” on every machine in the office. A well-run Windows 11 migration usually includes the following.
- Full device inventory. Every machine gets checked against the current Windows 11 compatibility requirements before any upgrade work begins.
- Data backup. User data and settings get backed up before an upgrade starts, so nothing is lost if something goes wrong.
- Application testing. Line-of-business applications get tested on Windows 11 first, since older or specialized software can behave differently.
- Staged rollout. A rollout schedule avoids taking down an entire office or department at once.
- Replacement planning. Any hardware that cannot make the jump gets budgeted for replacement ahead of time.
Businesses that treat this as a one-afternoon project tend to run into the same problems: a critical application that will not open, a printer driver that stopped working, or a staff member locked out during a busy week. Planning the sequence in advance, and testing before a full rollout, avoids most of that.
How SymTec Helps
A Windows 11 compatibility check from SymTec doesn’t require guessing or a trip to a big-box store. It works around your actual fleet.
SymTec’s compatibility check reviews your current devices at no cost, gives you a clear answer on which are ready, and lays out straightforward next steps if upgrades are needed, without jargon and without pressure to buy more than you need. From there, SymTec can handle the technical side of the Windows 11 migration itself: backing up data, testing your applications, scheduling the rollout around your business hours, and helping you budget for any hardware that needs replacing. If you would rather have an IT team manage the process from start to finish, that is exactly the kind of proactive support managed IT is built for.
Windows 11 Compatibility FAQ
If you’re ready to find out where your business stands, schedule your free compatibility check with SymTec.
