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In 2025, Windows security updates represent a fundamental pillar for protecting devices against emerging threats, especially with the end of support for Windows 10 in October.
Microsoft has focused its efforts on Windows 11 24H2, introducing improvements such as proactive ransomware protection, AI detection, and background updates that minimize disruptions.
These updates not only fix vulnerabilities but also strengthen the overall resilience of the system. This guide details the key improvements, how to apply them, and their impact on daily security. The best productivity apps from Microsoft
Improvements in threat detection and prevention
Windows 11 24H2 integrates advanced AI into Microsoft Defender for proactive detection, identifying malicious behaviors before they cause harm.
- Behavior-based detection: Analyzes process patterns to block ransomware and zero-day exploits, with a detection rate of 99.9% in AV-Test tests (January 2025).
- Protection against AI threats: Blocks attacks that use AI to evade detection, such as deepfakes in phishing.
- Optimized real-time scanningUse NPU on Copilot+ PCs for faster local scans, reducing latency by 30%.
object lessonA ransomware attempts to encrypt files; Defender blocks it by analyzing its anomalous behavior in seconds.
Background updates and resilience
Monthly updates (such as KB5041585 from September 2025) are installed without prolonged restarts, using "universal updates" for 40% fewer interruptions.
- Deferred updates: Pause non-critical updates for up to 35 days.
- Resilience to failureIf an update fails, the system automatically reverts without data loss.
- Support for legacy hardwareIn Windows 11, security patches continue until 2031, even on non-Copilot+ PCs.
ExampleDuring an update, the PC reverts if it detects instability, while maintaining active sessions.
| Improve | Description | Our Mill |
|---|---|---|
| AI in Defender | Behavioral detection | 99.9% effectiveness |
| Background | Installation without restarts | Fewer interruptions |
| Reverting errors | Automatic | No data loss |
Security against ransomware and exploits
Windows 11 24H2 strengthens ransomware protection with enhanced "Controlled Folder Access", blocking unauthorized changes to key folders.
- Protection against exploits: Support for Virtual Secure Mode (VSM) and Credential Guard to isolate sensitive processes.
- Supply chain attack detectionBlocks malware that exploits software updates.
- Integration with Microsoft Defender for EndpointFor businesses, it offers 24/7 monitoring with proactive AI.
ExampleA ransomware like LockBit attempts to encrypt documents; Controlled Folder Access blocks it, alerting the user.
Privacy and parental control improvements
- Privacy : Granular options for AI (e.g., disable Recall on Copilot+ PCs).
- parental control: In Family Safety, time limits and content filters with AI to detect toxic language in chats.
ExampleA parent blocks apps after 2 hours of use, with AI suggesting limits based on habits.
| Function | Improve | Use |
|---|---|---|
| AI Privacy | Deactivate Recall | Data control |
| Parental | Limits with AI | Child safety |
Updates from January 2025 and beyond
In KB5050009 (January 2025), Microsoft patched vulnerabilities such as CVE-2025-21338 (privilege escalation) and improved ransomware detection. Monthly updates continue to focus on proactive AI and resilience.
Council: Activate “Scheduled updates” in Configuration > Windows Update for automatic pauses.
Common troubleshooting
| Problem | Cause | A satisfactory solution |
|---|---|---|
| Update fails (0x80070002) | Corrupt files | Run DISM /Online /Cleanup-Image /RestoreHealth in CMD |
| Defender doesn't scan | Services stopped | Restart WinDefend in Services.msc |
| Ransomware blocked | False alert | Add folder to exceptions in Defender |
| AI Privacy | Data collected | Deactivate in Configuration > Privacy & Security > IA |
ExampleIf Defender blocks a legitimate file, add it to exceptions in virus protection > Exclusions.
Conclusion
Security updates from Windows In 2025, they're strengthening protection with proactive AI, ransomware detection, and background updates, especially in Windows 11 24H2. Keep your system updated, use Defender, and enable TPM 2.0 for maximum security. In Spain, with the end of support for Windows 10, migrate to Windows 11 for continuous patching until 2031.
FAQs
- Is Windows 11 more secure than Windows 10?
Yes, with TPM 2.0 and VBS. - How do I update monthly?
Go to Configuration > Windows Update > Search for updates. - Does Defender block legitimate files?
Yes, it adds exceptions in Windows security > Exclusions. - What happens in Windows 10 after 2025?
Without patches, vulnerable; migrate to Windows 11.
