the looming Security Crisis for Windows 10 Users
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While Windows 11 continues to evolve with new features, a meaningful security challenge is emerging for those still using Windows 10. Microsoft officially ended regular support for most Windows 10 versions on October 14, 2025, adn the recent November patch day marked a critical turning point: users are now receiving no further free critical security updates.
This impacts a massive number of systems. Current estimates indicate that roughly 40% of all Windows computers – approximately 560 million PCs globally – are still running Windows 10. Without ongoing security patches, these devices are increasingly vulnerable to malware and viruses. Microsoft is actively warning users about these risks and strongly recommending an upgrade to Windows 11 or the purchase of extended security support.
Extended Security Updates: A Paid Path Forward
For those unable or unwilling to immediately switch to Windows 11, Microsoft offers Extended Security Updates (ESU). This subscription service provides critical security updates for Windows 10 for up to three years,with the first year extending support until October 13,2026.
The program offers some appealing options. Private users can often enroll without cost simply by logging in with a Microsoft account and enabling cloud saving of their PC settings.Alternatively, a one-time fee of $30 or 1,000 Microsoft Reward points applies. Users within the European Economic Area receive the first year of ESU entirely free, with no additional requirements.
Once registered, devices receive security updates through the standard Windows Update process, beginning with the November patch release.
The Importance of Constant Protection: Microsoft Defender
This highlights the vital role of continuous updates, particularly for Microsoft Defender antivirus. This built-in security solution for both Windows 10 and 11 receives multiple daily updates to combat emerging threats. For example, version 1.441.85.0 was released on November 9, 2025 – a single example of the countless updates that Windows 10 users without an ESU subscription will now miss.
This constant updating is essential to modern IT security. without it, systems become vulnerable, posing a risk not only to themselves but also to entire networks.
A Potential Global Cybersecurity Threat
The November Patch Day serves as a crucial test. How many of the estimated 560 million Windows 10 users have opted into the ESU program? Security professionals are closely monitoring the situation, anticipating a potential surge in attacks targeting unpatched Windows 10 systems.
The sheer scale of potentially unprotected computers represents a significant global cybersecurity risk. The adoption rate of ESU will be a key metric in the coming months,impacting not only Microsoft but the entire IT security landscape.
The primary driver to upgrade is no longer simply access to new features, but a fundamental need for security. The coming weeks will reveal whether Microsoft’s warnings are heeded, or if millions of PCs become easy targets for cybercriminals.
PS: Planning a Windows 11 upgrade or wanting a safety net? Having a boot stick readily available is a smart move. Our free guide details how to create a Windows 11 USB boot stick and get it running in minutes in case of emergency – complete with a checklist of necessary files. Get your free guide to creating a secure Windows 11 boot stick here
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