Windows 10 End of Support: What Businesses Need to Do in 2026
Windows 10 may still be running perfectly well on some of your business computers.
Employees can open Microsoft 365, access shared files, browse the web and run their usual applications. From a user's perspective, there may be little reason to change anything.
But from an IT and cybersecurity perspective, the situation is very different.
Microsoft officially ended support for Windows 10 on October 14, 2025. Standard security updates, feature updates and technical support are no longer provided for supported Windows 10 editions.
That means businesses still operating Windows 10 devices in 2026 are managing an increasingly important technology risk.
The good news is that you do not necessarily need to replace every computer immediately. The right approach depends on the age, hardware capabilities, business role and security requirements of each device.
What Does Windows 10 End of Support Actually Mean?
End of support does not mean your computer suddenly stops working.
Instead, it means Microsoft has stopped providing the normal security and software updates that keep the operating system protected and supported.
After October 14, 2025, Windows 10 no longer receives regular security fixes, feature updates or general technical support. Microsoft continues to recommend moving compatible devices to Windows 11 or replacing devices that cannot support it.
This creates an important distinction:
A computer can still function while becoming increasingly difficult to justify from a security and risk-management perspective.
Every new vulnerability discovered in unsupported software has the potential to become a long-term exposure if no security fix is available for that version.
For businesses, that can turn an apparently harmless legacy device into part of a wider cybersecurity problem.
Why Unsupported Windows 10 Devices Are a Business Risk
The biggest mistake is to treat this as a hardware upgrade issue alone.
Windows 10 end of life can affect cybersecurity, compliance, business continuity and IT operations.
1. Unpatched systems increase cybersecurity exposure
Security vulnerabilities do not disappear simply because an operating system has reached the end of its lifecycle.
Attackers can continue looking for weaknesses in outdated software, while businesses using unsupported systems have fewer options for addressing newly discovered vulnerabilities.
This becomes particularly concerning when Windows 10 computers are used to access:
Business email
Customer information
Financial systems
Cloud applications
Shared company files
Remote access platforms
Internal business applications
A single vulnerable endpoint may become an entry point into a much larger environment.
2. Unsupported software can complicate compliance
Many organisations have obligations around protecting personal, financial or sensitive information.
The specific requirements depend on your industry and jurisdiction, but a common security principle is the use of supported and appropriately patched technology.
For Singapore businesses, this is particularly relevant when considering obligations under frameworks such as the Personal Data Protection Act (PDPA), contractual security requirements and industry-specific controls.
The important point is not that Windows 10 automatically makes a company non-compliant.
Rather, continuing to operate unsupported systems can make it harder to demonstrate that reasonable security measures are in place.
3. Other software may eventually stop supporting Windows 10
The operating system is only one part of the technology stack.
Browsers, security tools, accounting applications, line-of-business software and other business applications can eventually reduce or end support for an older operating system.
Microsoft has also stated that Microsoft 365 Apps on Windows 10 will receive security updates through October 10, 2028, but businesses should still plan their migration because Microsoft 365 is designed to run on supported Windows operating systems.
So, waiting for every application to stop working is not a sensible migration strategy.
By then, the business may be dealing with compatibility problems under greater time pressure.
4. It can increase operational and insurance risk
An unsupported endpoint can also complicate wider risk management.
Cyber insurers, customers and business partners may ask about patching, endpoint protection and technology support arrangements as part of their security assessments.
If your organisation cannot clearly identify which devices are unsupported and what compensating controls are being used, that can create unnecessary questions during security reviews or insurance discussions.
What Should Businesses Do About Windows 10?
There is no single answer for every PC.
Instead, businesses should assess their Windows 10 devices and place each one into an appropriate transition path.
Option 1: Upgrade eligible PCs to Windows 11
For compatible devices, upgrading to Windows 11 is usually the simplest long-term solution.
Microsoft's minimum requirements include a compatible processor, at least 4 GB of RAM, 64 GB of storage, UEFI with Secure Boot capability and TPM 2.0.
Eligible Windows 10 devices can be upgraded without purchasing a new Windows licence, although businesses should still plan for testing, deployment and user disruption.
Before upgrading, check:
Hardware compatibility
Business-critical applications
Device encryption
Existing security software
User data and backups
Peripheral and printer compatibility
Microsoft 365 configuration
Line-of-business applications
For a small business with a relatively modern fleet, upgrading compatible machines may be the most practical approach.
Option 2: Use Extended Security Updates as a temporary bridge
Some computers cannot move to Windows 11 immediately.
Perhaps a specialist application requires more testing. Perhaps a replacement device has already been ordered. Or perhaps the business needs additional time to complete a wider technology refresh.
This is where Microsoft's Extended Security Updates (ESU) programme can provide a temporary bridge.
For commercial organisations, Windows 10 ESU provides critical and important security updates for enrolled devices for up to three years after the end of support date. Microsoft's published pricing starts at US$61 per device for the first year and doubles in each subsequent year.
However, ESU should not be treated as a permanent solution.
It does not bring Windows 10 back into full support. It does not provide new features, and it does not solve the underlying issue of ageing hardware.
Think of ESU as buying time, not eliminating the need to migrate.
Option 3: Replace devices that have reached the end of their useful life
Some PCs simply are not worth upgrading.
If a computer is several years old, cannot meet Windows 11 requirements and already suffers from performance or reliability problems, replacing it may make more financial sense than extending its lifespan.
A replacement decision should consider more than the purchase price.
Look at the total cost of keeping the old device:
ESU licensing
IT support
Repairs
Downtime
Reduced employee productivity
Compatibility problems
Security controls
Remaining useful life
A new Windows 11 device may therefore be an IT investment rather than simply an additional hardware expense.
Do Not Upgrade Every PC the Same Way
One of the most useful steps businesses can take is to stop treating the PC fleet as a single group.
For example:
Finance laptop: Upgrade immediately if compatible because it handles sensitive financial information.
Older warehouse workstation: Assess whether replacement is more cost-effective than ESU.
Specialist engineering PC: Test critical applications before upgrading and use ESU temporarily if necessary.
Executive laptop: Prioritise migration because it may contain sensitive information and have broad access to company systems.
This approach lets IT teams prioritise based on business risk instead of simply working through a spreadsheet alphabetically.
A Practical Windows 10 Migration Plan
If your organisation still has Windows 10 devices, start with visibility.
Step 1: Identify every Windows 10 device
Create an accurate inventory of computers still running Windows 10.
Record useful information such as:
User
Department
Device age
Windows edition and version
Hardware specifications
Business-critical applications
Security software
Device location
Replacement status
Do not rely entirely on what employees’ report. Use your endpoint management or IT management tools where possible.
Step 2: Assess Windows 11 compatibility
Determine which machines meet the Windows 11 hardware requirements.
Microsoft provides compatibility guidance and tools to help organisations determine upgrade eligibility.
Step 3: Prioritise high-risk devices
Not every Windows 10 computer presents the same level of risk.
Prioritise devices based on factors such as:
Access to sensitive data
Privileged user access
Internet exposure
Business criticality
Device age
Security control coverage
Application dependencies
This helps businesses focus limited IT resources where they matter most.
Step 4: Choose an appropriate transition path
For each device, decide whether to:
Upgrade to Windows 11
Enrol in ESU temporarily
Replace the device
Retire the device entirely
The last option is worth remembering.
An unused PC that remains connected to the company network is not an asset. It is an unmanaged endpoint.
Step 5: Test before deploying at scale
Do not upgrade 100 machines on a Friday afternoon and hope everything works on Monday.
Test Windows 11 with a representative group of users first.
Check the applications and workflows employees actually depend on, including printers, VPN access, authentication tools, shared drives and specialist software.
A controlled rollout can reveal compatibility problems before they affect the wider organisation.
Windows 10 End of Support FAQs
Is Windows 10 still safe to use in 2026?
Windows 10 computers can continue to function, but standard support and security updates ended on October 14, 2025. Continuing to use unsupported devices without an appropriate transition or ESU strategy increases security and operational risk.
Can businesses still get security updates for Windows 10?
Yes. Microsoft's Extended Security Updates programme allows commercial organisations to receive eligible security updates for Windows 10 devices for up to three years after end of support. ESU is a paid programme and does not restore full Windows 10 support.
Is upgrading from Windows 10 to Windows 11 free?
Eligible Windows 10 devices can be upgraded to Windows 11 without purchasing a new Windows licence. However, the device must meet Microsoft's hardware and operating system requirements.
What if my computer cannot run Windows 11?
You generally have two practical choices: use ESU temporarily while planning the next step or replace the device with hardware that supports Windows 11.
The right decision depends on the device's age, business importance, application requirements and total cost of ownership.
Should I replace every Windows 10 computer?
No.
A blanket replacement programme may waste money if many existing computers are fully capable of running Windows 11.
A better approach is to assess the fleet individually and create a risk-based upgrade and replacement plan.
Conclusion: Windows 10 Migration Is Now an IT Planning Issue
The biggest risk with Windows 10 end of support is not that your computers suddenly stop working.
It is that everything appears normal while the security and support gap grows in the background.
For businesses in Singapore and across the region, the practical response is to identify remaining Windows 10 devices, assess their risk, upgrade compatible hardware and create a clear replacement or ESU strategy for everything else.
This is also an opportunity to review your wider endpoint management approach. A well-managed IT environment should give you visibility into which devices are supported, which need attention and where security risks are developing.
If managing device upgrades, patching and endpoint security is becoming difficult to handle internally, managed IT services can help businesses maintain better visibility and control across their technology environment. A managed IT provider can support device inventories, patch management, lifecycle planning and ongoing endpoint maintenance, helping your team stay ahead of technology changes rather than reacting to them after support has ended.
