Windows 11 Upgrade: What Small Businesses Should Do

Windows 10 reached its end of support on 14 October 2025. If some of your business computers still run it, they no longer receive free security updates, and every month that passes makes them a bigger risk. This guide walks you through a calm, practical Windows 11 upgrade plan: which PCs can upgrade, what to do with the ones that cannot, and how to avoid disrupting your work.

White laptop open on a desk showing a blue abstract wallpaper on its screen — Many business laptops can move to Windows 11 for free; the trick is knowing which ones.

Key takeaways

Windows 10 support ended on 14 October 2025, so unpatched PCs are exposed to newly discovered security flaws.
Use the PC Health Check app to see which machines meet Windows 11 requirements, including TPM 2.0 and a supported processor.
Paid Extended Security Updates (ESU) can buy business PCs time, but the cost doubles each year and it is a bridge, not a plan.
Back up, test your key software and upgrade in small batches, starting with the least critical machine.

For many small businesses, Windows upgrades happen by accident: a PC dies, a new one arrives with the latest version, and nobody thinks about it again. The end of Windows 10 support breaks that habit. Computers still running it will keep working, but Microsoft no longer fixes the security holes that attackers discover. For a business that handles customer data, payments or accounts, that is not a risk worth carrying for long.

The good news is that this is a manageable project, even without an IT department. Microsoft's support pages change as policies evolve, so check the current details on Microsoft's site as you go. This guide focuses on the decisions and the order of work.

What end of support really means

"End of support" does not mean your PC switches off. It means:

No more free security updates. New vulnerabilities found in Windows 10 are no longer patched for regular users.
No more feature updates or technical help from Microsoft for Windows 10.
Gradual software drop-off. Over time, app makers stop testing and supporting their products on older versions of Windows. Browsers, accounting tools and printer drivers may follow.
Compliance questions. Payment card rules, cyber insurance policies and client security questionnaires often ask whether you run supported software. An unsupported operating system can be a problem in those conversations.

14 Oct 2025 The date Windows 10 reached end of support and stopped receiving free security updates Microsoft

Step 1: Take stock of every PC

Start with a simple inventory. A spreadsheet is fine. For every Windows computer in the business, record:

Who uses it and what it is used for
The Windows version it runs
Its rough age and whether it still runs well
The key software it needs, such as accounting, design, point of sale or industry-specific tools
Whether it passes the Windows 11 compatibility check

Do not forget the computers people forget: the PC behind the shop counter, the machine connected to a label printer or the old laptop in a drawer that someone still uses for a single task.

Step 2: Check Windows 11 compatibility

Windows 11 has stricter hardware requirements than Windows 10. According to Microsoft, they include:

TPM 2.0: a Trusted Platform Module, a security chip (or firmware feature) that protects encryption keys. On some PCs it exists but is switched off in the firmware settings.
A supported 64-bit processor from Microsoft's list of compatible CPUs.
UEFI firmware with Secure Boot capability. UEFI is the modern replacement for the old BIOS start-up software; Secure Boot helps block malicious code when the PC starts.
At least 4 GB of RAM and 64 GB of storage. In practice, business users will want more for smooth performance.

The easiest check is Microsoft's free PC Health Check app. Run it on each machine and note the result. If it reports a TPM or Secure Boot problem, the feature may simply be turned off; a technician or the PC maker's support pages can tell you whether it can be enabled.

Common mistake

Using unofficial workarounds to force Windows 11 onto unsupported hardware. Guides online show how to bypass the checks, but Microsoft does not support those installations and they may not receive updates reliably. For a business PC, the time saved is rarely worth the risk.

Step 3: Choose a path for each machine

Once you know which PCs pass and which fail, every machine falls into one of four paths.

Situation	Best path	Notes
Compatible and in good shape	Free upgrade to Windows 11	Back up and test software first
Compatible but slow or failing	Replace	Upgrading old hardware rarely fixes performance
Not compatible	Replace, or ESU as a short bridge	Budget for replacement within your ESU window
Runs one essential legacy program	Test with the vendor, then isolate or replace	Ask the vendor about Windows 11 support or a cloud version

Extended Security Updates as a bridge

Microsoft offers Extended Security Updates for Windows 10, which continue critical security patches for a limited time. For businesses, ESU is paid per device per year and available for up to three years, to October 2028. Microsoft set the year one price starting at US$61 per device, and the price doubles each year after that. Local prices and licensing routes vary, so check with Microsoft or your reseller.

For consumers, Microsoft offered one extra year of ESU to 13 October 2026, with free or low-cost enrollment options. Microsoft has reportedly extended the consumer program, so check Microsoft's current information if a sole trader is using a personal PC for business.

The doubling price is deliberate: ESU is designed to cover a delay, not to replace an upgrade. Use it only for machines that truly cannot move yet, and put a replacement date in the calendar.

Laptop on a desk displaying a colorful abstract pattern on its screen — A planned replacement beats an emergency purchase when an old PC finally gives up.

Step 4: Prepare before you upgrade

A little preparation turns a stressful afternoon into a routine job.

Back up everything. Make sure files are synced to your cloud storage or backed up to a separate drive, and confirm you can actually open the backup.
Check key software. Visit each vendor's support pages or ask them directly whether your version supports Windows 11. This is especially important for accounting, payroll, design, medical, legal and industry tools.
Check printers and peripherals. Look for Windows 11 drivers for printers, scanners, label printers, card readers and specialist devices.
Collect licenses and logins. Store product keys and account details in your password manager before you start.
Pick a quiet time. Upgrades can take a while and need several restarts. Avoid month end, payroll day or your busiest trading hours.

Pro tip

Upgrade the least critical compatible PC first and use it for a few days. If your accounting software, printer and everyday apps all behave, roll out to the rest in small batches. If something breaks, you have only one machine to fix and you have learned the problem before it hits everyone.

Step 5: Run the upgrade

Install pending Windows 10 updates. Bring the PC fully up to date first; this often makes the upgrade offer appear.
Start the upgrade. On eligible PCs, the Windows 11 upgrade is usually offered through Windows Update in the settings. Microsoft also provides an installation assistant on its website.
Keep the PC plugged in. Do not let a laptop run on battery during the upgrade.
Sign in and check your apps. Open each key program, print a test page and confirm files and email are working.
Review security settings. Confirm Microsoft Defender or your antivirus is active, device encryption is turned on where available and automatic updates are enabled.
Note the result. Update your inventory spreadsheet with the date and any issues.

Windows usually keeps a short window during which you can roll back to Windows 10 if something goes badly wrong. Do not rely on it as your safety net; your backup is the real one.

Hypothetical example

Imagine an accounting practice with seven PCs. The inventory shows four pass the compatibility check, two are too old and one runs a legacy tax tool. The owner upgrades one compatible PC on a Friday afternoon, tests it over the weekend, then upgrades the other three the following week. The two old machines are replaced over the next two months. The legacy tool's vendor confirms a newer version supports Windows 11, so the last PC moves too. The whole project spreads over a quarter, with no rush and no lost workdays.

Step 6: Retire old PCs safely

Replaced computers still hold business data. Before you sell, donate, recycle or store them:

Make sure all files are copied to the new machine or cloud storage.
Sign out of accounts and remove the device from your Microsoft, Google or other business accounts.
Use the reset option in the settings that removes everything and cleans the drive, or have a recycling partner provide certified data wiping.
Record what happened to each machine in your inventory.

When to get outside help

You can handle a handful of PCs yourself with this guide. Consider an IT provider if you have more than ten or so machines, depend on specialist software, need to buy and set up replacement devices quickly, or want centralized management so future updates happen without hands-on visits. A short engagement can also set up device management tools that make the next upgrade far easier.

Your Windows 11 upgrade checklist

List every Windows PC, its user, age and key software
Run PC Health Check on each machine and record the result
Assign each PC a path: upgrade, replace, ESU bridge or vendor check
Confirm Windows 11 support for critical software and printers
Back up all data and test that you can restore it
Upgrade one low-risk PC first and test for a few days
Roll out to the remaining compatible PCs in small batches
Budget and schedule replacements for incompatible machines
Wipe and record retired devices before they leave the business

Frequently asked questions

Is the upgrade from Windows 10 to Windows 11 free?

For compatible PCs with a genuine Windows 10 license, Microsoft has offered the upgrade at no extra cost. Check Microsoft's current terms, especially for business licenses.

Can I keep using Windows 10 if I am careful?

The PC will keep working, but without security patches, careful habits cannot protect you from vulnerabilities in the operating system itself. If you must keep a machine on Windows 10 for a while, consider ESU and limit what it is used for.

Will my files and programs survive the upgrade?

An in-place upgrade normally keeps files, settings and most programs. Problems are uncommon but possible, which is why a tested backup and a software compatibility check come first.

Should I switch to Mac instead of buying new Windows PCs?

It can make sense for some teams, but check that all your business software runs on macOS first. Some accounting and industry tools are Windows only. Our Mac vs Windows comparison covers the trade-offs.

The bottom line

Windows 10 is no longer supported, and running it on business computers is a growing security and compliance risk. The fix is a simple project: inventory your PCs, check compatibility with PC Health Check, upgrade the ones that pass, replace the ones that do not and use paid ESU only as a short bridge.

Back up first, test on one machine and move in small steps. Check Microsoft's current guidance as you go, and you will finish with a fleet of supported computers and a clear record for the next upgrade cycle.