Windows 10 End of Support: Guide for AU Business

What "end of support" actually means

The windows 10 end of support date was 14 October 2025. From that point, Windows 10 hit what Microsoft calls windows 10 end of life: no more free security patches, no feature updates, no standard technical support. Your computers still switch on and still run your line-of-business apps, which makes it easy to assume nothing has changed. That assumption is the trap.

A PC that stops receiving security updates doesn't fail loudly. It piles up unpatched vulnerabilities in the background. In the months since the windows 10 end of support milestone, researchers and criminals have kept finding new flaws, and Microsoft patches them in Windows 11 but not in Windows 10. Attackers know which businesses are slow to migrate, and an out-of-date operating system is one of the first things they probe.

For Australian organisations this goes beyond IT housekeeping. Under the Australian Privacy Act and the Notifiable Data Breaches scheme, you're expected to take reasonable steps to protect personal information. The ACSC Essential Eight lists patching operating systems and using supported software as core controls. Run an unsupported OS and you undercut both, which matters if you handle customer data, work with government, or carry cyber insurance.

The risks of doing nothing

Plenty of business owners are tempted to wait. The machines work, staff are busy, and new hardware costs money. The cost of inaction stacks up faster than most people expect:

• •Security exposure. An unpatched Windows 10 machine is an open door for ransomware and credential theft, and one infection can halt your whole office, not just one device.
• •Insurance and compliance gaps. Many cyber insurance policies now require supported, patched operating systems. An insurer can reduce or refuse a claim if you were running end-of-life software.
• •Software drift. Vendors drop Windows 10 support too. Over time your accounting package, browser and security tools stop getting updates on the old OS.
• •Lost productivity. A forced, last-minute migration after an incident costs you far more disruption than a planned one.

Should I upgrade to Windows 11 or buy new PCs?

This is the question we hear most: should I upgrade to Windows 11, or is it time to replace the hardware? The honest answer depends on the age and spec of each machine, so make the call device by device rather than across the whole office at once.

If a PC meets the windows 11 requirements and is only two or three years old, an in-place upgrade is usually the low-cost path. If a machine is already five-plus years old, slow, or fails the hardware check, a new device often delivers better value, because pouring upgrade effort into hardware that will struggle within a year wastes your time. A clean inventory of every PC, its age and its compatibility status gives you the foundation for a good plan.

The cheapest migration is the one you plan calmly over a few months, not the one you scramble through after an incident or a failed audit.

For many Sydney SMBs, a staged refresh works best: upgrade the eligible machines now, replace the oldest hardware in batches as budget allows, and use the moment to put everyone on the same setup. A consistent fleet is far easier and cheaper to support. Our managed IT services team runs this kind of fleet audit and phased rollout regularly, so your office keeps working while we migrate machines in the background.

Windows 11 hardware requirements explained

Windows 11 sets stricter hardware rules than any previous version, and that's the main reason some machines can't do a straight windows 10 to windows 11 upgrade. The headline windows 11 requirements are:

• •TPM 2.0 (Trusted Platform Module), a security chip that handles encryption keys. Many business machines have it, but switched off in the BIOS.
• •UEFI firmware with Secure Boot enabled, rather than legacy BIOS mode.
• •A compatible 64-bit processor from Microsoft's supported list (broadly Intel 8th-generation or newer, and equivalent AMD Ryzen chips).
• •4 GB RAM minimum and 64 GB storage, though for real business use we recommend 8 GB or 16 GB and an SSD.

Often TPM and Secure Boot sit disabled rather than missing. A machine that fails the first compatibility check can sometimes pass after a quick firmware setting change, which costs you a lot less than a replacement. Run that check across your whole fleet before you assume you need new hardware.

How to upgrade from Windows 10 to Windows 11

Once you know which machines are eligible, the mechanics of how to upgrade to windows 11 are straightforward, though the order of operations matters. Here is the process we follow when we upgrade to windows 11 from windows 10 for a client:

A safe upgrade sequence

• •Back up first. Confirm a clean, tested backup of each machine and your business data before you touch anything. Skip this and you're gambling.
• •Run the PC Health Check. Microsoft's free tool tells you whether a device meets the requirements and, if not, exactly which one it fails.
• •Check your apps. Confirm your accounting, industry and security software all support Windows 11 before the upgrade, so nothing breaks mid-day.
• •Upgrade with the right tool. Eligible machines update through Windows Update, or you can use the windows 11 upgrade assistant to start the process manually on a specific device.
• •Pilot, then roll out. Upgrade one or two machines first, confirm everything works, then schedule the rest in batches outside business hours.

For a single home PC, the windows 11 upgrade assistant is genuinely simple. Across a business, the upgrade button isn't the hard part. The work is coordinating dozens of machines, drivers, printers, line-of-business apps and user data without losing a day of productivity. Manage it centrally, ideally alongside your Microsoft 365 environment, and you can push and monitor the rollout without walking to every desk.

Building your migration plan

A migration that's past its windows 10 end of support deadline deserves priority, though you can still run it calmly. Use a simple four-step plan that any Sydney business can follow, on its own or with help:

• •1. Inventory. List every machine, its age, spec and Windows 11 compatibility status. This tells you the true scale and cost.
• •2. Decide per device. Mark each PC as upgrade, replace, or bridge with ESU. Group the decisions so you can budget in stages.
• •3. Schedule. Migrate in batches, highest-risk machines first, with backups and a rollback plan for each wave.
• •4. Verify. Confirm each migrated device is patched, encrypted, and meets your Essential Eight baseline before you sign it off.

Run it this way and the project rarely disrupts the business. You're after reliability and measurable progress: a known number of machines migrated each week, every device supported and patched, and no nasty surprises for staff. If your fleet is large or your in-house resources are stretched, our cyber security team can run the audit, prioritise by risk, and manage the rollout end to end so your team stays on the work that pays the bills.

The bottom line: windows 10 end of life isn't a reason to panic, but it's a firm reason to act. Map your machines, choose upgrade or replace for each one, and get every device onto a supported, secure platform. Your data, your compliance position and your insurance all ride on it.

This article reflects best practices as of the publication date. Technology and security recommendations change, so check current guidance with the original sources or our team before you act.