Key date: Windows 10 reached end of support on October 14, 2025. Microsoft no longer releases security fixes or updates for it. Your PCs still run, but risk, compliance and maintenance headaches compound every month. HTG helps organizations move to Windows 11 with migration planning and lifecycle management, managed IT support and security hardening.
Updated November 12, 2025
What Changes After October 14, 2025
- No more security patches for Windows 10 (unless you buy Extended Security Updates).
- Extended Security Updates (ESU) are paid, temporary fixes—no new features, only security patches for up to three years.
- Microsoft 365 apps keep security updates until 2028 but lose new features and compatibility over time.
- Browsers like Edge and Chrome will still update for a while—but can’t patch OS-level vulnerabilities.
The Big Picture: It’s Not Just Windows
Think in layers. Every security, compliance, and productivity tool you rely on sits on top of the operating system.
- EDR/XDR/AV: Agents can’t fully protect an unpatched OS. Kernel vulnerabilities remain exploitable.
- RMM, VPN, DLP, PAM: Vendors taper off testing and support on legacy platforms—expect more bugs and fewer fixes.
- Line-of-business apps: ERP, POS, EMR, and finance systems lose Windows 10 certification over time.
- PCI DSS expects systems to be supported and patched, and a HIPAA risk analysis or cyber insurance review will flag unsupported Windows as a finding.
Numbers That Matter
- Hundreds of millions of devices were still running Windows 10 when support ended.
- Some share of your fleet won’t meet Windows 11’s hardware requirements (TPM 2.0, Secure Boot, supported CPU). An inventory tells you exactly how many.
- IBM’s 2026 Cost of a Data Breach Report puts the global average breach at $4.99 million, and unsupported endpoints make one more likely.
Practical Options for IT Leaders
- Upgrade in place to Windows 11 (for compatible hardware). Validate TPM 2.0, Secure Boot, and firmware, then pilot before scaling.
- Refresh what can’t upgrade. Replace or repurpose with lightweight, supported OSs for kiosks or frontline devices.
- Time-box ESU for exceptions. Buy time for critical systems but set a hard exit date.
- Harden your baseline. Turn on BitLocker, Credential Guard, ASR rules, least privilege, and modern identity controls.
How HTG Helps
- Readiness report: Full inventory of Windows 10 machines, upgrade eligibility, and risk by business unit.
- App compatibility & pilots: Validate apps and drivers, remediate blockers, and pilot upgrades.
- Automated deployments at scale: Engineering & Integration using Intune/Autopilot or your tools for low-downtime rollouts.
- Right-sized ESU plan: Enroll only what’s essential, with a clear exit plan.
- Security hardening & cleanup: Baseline tuning, EDR tuning, identity protections, and safe ITAD for retired hardware.
Staying on Windows 10 now means rising risk, growing support cost and compliance exposure. Upgrade what you can, refresh what you must, and put a hard end date on ESU.
Plan your Windows 11 transition now.
We can put together a Windows 11 readiness and migration plan for your environment, including which devices need to be replaced and retired.
📞 Schedule a Consultation Explore HTG HomeFAQ: Windows 10 End of Support & Windows 11 Migration
When does Windows 10 reach end of support?
Microsoft officially ends Windows 10 support on October 14, 2025. After that, no security or feature updates are released.
What are Extended Security Updates (ESU)?
ESUs are paid security-only updates for up to three years. They buy time for critical systems but don’t add new features or improvements.
How can HTG help with Windows 11 migration?
HTG provides inventory audits, app validation, automated deployment, and security hardening for Windows lifecycle management—fast, predictable, and compliant.