Windows Update error 0x8007371B appears when the update process detects missing or corrupted files in the system’s component store—often caused by interrupted updates, disk corruption, or conflicting software. This error stops patches from installing and leaves your PC vulnerable. To resolve it: restart your computer to clear temporary blocks. Then run the Windows Update Troubleshooter: go to Settings → Update & Security → Troubleshoot → Additional troubleshooters → Windows Update to let Windows automatically detect and fix issues. Next, clear and reset the update cache: stop the Windows Update, Background Intelligent Transfer Service (BITS), and Cryptographic Services, delete all files in the
C:WindowsSoftwareDistribution and C:WindowsSystem32catroot2 folders, and restart those services. After that, open an elevated Command Prompt and run:sfc /scannow
DISM /Online /Cleanup-Image /RestoreHealth
This repairs system files and restores the Windows image. Finally, reboot your PC and run Windows Update again—it should now install updates successfully. For a full, step‑by‑step walkthrough with screenshots and extra tips, check out this detailed guide.