Microsoft Delivers Critical Security Update for Windows 10 Users
Windows 10 users are in for a dose of good news as Microsoft has released an extended security update (ESU) for versions 22H2 and 21H2. The KB5120249 update is mandatory, containing the August 2026 Patch Tuesday security updates that address critical vulnerabilities and bugs. This update is essential for all Windows 10 users, especially those who rely on their devices for business or personal activities.
The update can be installed via the usual channels: by checking for updates in the Settings app under Update & Security, or by manually downloading it from the Microsoft Update Catalog. Once applied, Windows 10 will be updated to OS Builds 19045.7663 and 19044.7663. This ensures that users have the latest security patches and features.
One notable fix included in this update is a resolution for a File History backup issue. Previously, automatic backups to network shares using Server Message Block (SMB) might fail with an “invalid credentials” error, causing scheduled backups to fail altogether. With this update, Microsoft has addressed this problem, ensuring that users can rely on their backups.
Additionally, the company is expanding the rollout of new Secure Boot certificates. This means that more devices will be eligible for automatic updates, further enhancing security and reducing the risk of malware infections. While Secure Boot certificate deployment via Windows updates continues across supported PCs and non-managed business devices in the coming months, this update sets the stage for improved security.
The importance of regular security updates cannot be overstated. In a recent report, it was revealed that once attackers gain valid credentials, only 37% of their actions are blocked by existing defenses. This highlights the need for ongoing vigilance and proactive measures to prevent breaches. Microsoft’s efforts in this area are commendable, demonstrating its commitment to keeping Windows users safe.
To wrap up, the KB5120249 update is a must-have for all Windows 10 users. It not only addresses critical vulnerabilities but also brings new features and improvements to the table. To stay secure, it’s essential to install updates as soon as they become available. Remember to regularly check for updates in the Settings app or manually download them from the Microsoft Update Catalog to ensure your device is protected against emerging threats.
Source: Bleeping Computer — 2026-08-11