System Is Missing Important Windows Security Updates in FACEIT AC

"Your system is missing important Windows security updates. Please run Windows Update to keep using FACEIT AC." I still have that problem. What about manual installation? My files will be safe after this? I hope they won't be deleted. If they will pls text me back guys.https://www.reddit.com/r/FACEITcom/comments/1jcw06z/your_system_is_missing_important_windows_security/

The error message “Your system is missing important Windows security updates in FACEIT AC” means that your system is missing essential Windows security updates required by the FACEIT anti-cheat software.

This issue can be caused by an outdated version of Windows, missing critical security patches, disabled Windows Update services, or incompatible system settings.

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Now, you can follow the methods below to solve this problem.

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Fix 1. Run Windows Update Troubleshooter

Sometimes, Windows update fails due to system problems, preventing critical security patches from being installed. You can detect and fix the problem that caused the error by running the built-in tool Windows Update Troubleshooter. Here are the steps:

1. Press the Win + I key to open Settings.
2. Navigate to Update & Security >Troubleshoot > Additional troubleshooters.
3. Under Get up and running, click Windows Update > Run the troubleshooter.
4. Wait for the troubleshooter to detect the problem, and then follow the on-screen instructions to apply the recommended fixes.

Fix 2. Use Windows Update Assistant

Sometimes Windows Update may fail to install critical patches due to corrupted system files, misconfigured update services, or background conflicts. In this case, the Windows Update Assistant installs Windows correctly.

1. Visit the official Windows Update Assistant website for Windows 10 or Windows 11.
2. Click Update Now for Windows 10 or Download Now for Windows 11 to get the update tool.
3. Open the downloaded file and click Yes if prompted by User Account Control (UAC).
4. The tool will automatically check for available updates for your system.
5. If updates are found, click Update now.
6. The Assistant will download and install the updates. Your computer may restart a few times during this process.

Fix 3. Use Media Creation Tool

In addition, the Media Creation Tool can download the latest Windows version directly from Microsoft and perform a clean installation without erasing files or applications.

1. Visit the official Microsoft Media Creation Tool page for Windows 10 or Windows 11.
2. Scroll down to the Create Windows 10/11 installation media section and click Download now.
3. Find the downloaded file, right-click it, and select Run as administrator. Then click Yes if prompted by User Account Control.
4. Review and accept Microsoft’s license terms and wait for the tool to prepare the installation files.
5. Select Upgrade this PC now and click Next.
6. On the Ready to install screen, make sure Keep personal files and apps is selected to avoid data loss.
7. Click Install.

After the installation is complete, restart your computer and follow the on-screen prompts to complete the setup.

Fix 4. Disable VBS

Virtualization-Based Security (VBS) is a Windows feature designed to enhance system security by isolating critical processes using hardware virtualization.

While this increases protection against malware, it may also block applications such as FACEIT Anti-Cheat, triggering “FACEIT AC Your system is missing important Windows security updates”.

1. Type cmd in the Search bar, then right-click on Command Prompt and select Run as administrator to open the Command Prompt as administrator.
2. In the Command Prompt window, type the bcdedit /set hypervisorlaunchtype off command and press Enter.
3. After the command is successfully executed, restart your computer and check if the problem is resolved. If the issue is solved, you can re-enable VBS.

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Bottom Line

When faced with the issue of “your system is missing important Windows security updates in FACEIT AC”, try the solutions above to solve it.