Windows Update error (Your device is missing important security and quality fixes)

You can try these methods to troubleshoot your Windows 10 update issue:

Method 1: Run SFC Scan.

To run an SFC scan, follow these steps:

Run Command Prompt as Administrator.

Type sfc /scannow and hit Enter.

This will check and run an auto-repair on the issue.

Method 2: Run DISM Tool.

After running the SFC scan and the issue still persist, run the DISM to check the system health and to try restoring the files. To run DISM tool, follow these steps:

Run Command Prompt as Administrator.

Type the following commands:

DISM.exe /Online /Cleanup-image /scanhealth

DISM.exe /Online /Cleanup-image /Restorehealth

NOTE: This might a while to finish scanning. Do not cancel.

Method 3:

After doing Method 1 and Method 2 but the issue still persist, you can manually reset the Windows Update Components and Run Windows Update process again.

Resetting Windows Update Components will fix those corrupted Components and will help the Update installation quickly. To reset Windows Update Components, follow these steps:

Run Command Prompt as Administrator

Stop BITS, Cryptographic, MSI Installer and Windows Update Services. To do this, type the following commands:

Net stop wuauserv

Net stop cryptSvc

Net stop bits

Net stop msiserver

Rename SoftwareDistribution and Catroot2 folder. To do this, type the following commands:

Ren C:\Windows\SoftwareDistribution SoftwareDistribution.old

Ren C:\Windows\System32\catroot2 Catroot2.old

Restart BITS, Cryptographic, MSI Installer and Windows Update Services. To do this, type the following commands:

Net start wuauserv

Net start cryptSvc

Net start bits

Net start msiserver

Restart your computer and try to install Windows Update.

Let us know how it goes.