2025-10 Cumulative Update for Windows 10 Version 22H2 for x64-based Systems (KB5066791)

[teku77]

Download and install latest BIOS my win 10 can't update this 2025-10 Cumulative Update for Windows 10 Version 22H2 for x64-based Systems (KB5066791

[Pallipurath]

Hi @teku77,

Welcome to the HP Support Community!

Thanks for reaching out!

You’re dealing with two separate issues here:

1. Windows Update KB5066791 failing to install
2. Updating the BIOS on your HP PC

Let’s tackle them step by step:

Why KB5066791 Won’t Install

This cumulative update for Windows 10 Version 22H2 can fail due to:

• Corrupted Windows Update components
• Pending restart or incomplete rollback
• Outdated BIOS or drivers
• Insufficient disk space or system file corruption
   

Fix Windows Update Issue

Run Windows Update Troubleshooter

• Go to Settings → Update & Security → Troubleshoot → Additional troubleshooters → Windows Update.
  
   

Reset Windows Update Components

• Open Command Prompt (Admin) and run: net stop wuauserv 
                                                                       net stop bits
                                                                            net stop cryptsvc
         ren C:\Windows\SoftwareDistribution SoftwareDistribution.old 
         ren C:\Windows\System32\catroot2 catroot2.old
                                                                            net start wuauserv
                                                                            net start bits
                                                                            net start cryptsvc
• Then retry the update.

Use Microsoft Update Catalog

• Download KB5066791 manually: 👉 Microsoft Update Catalog – KB5066791
•  

1. Run DISM and SFC :DISM /Online /Cleanup-Image /RestoreHealth
                                            sfc /scannow

Update HP BIOS

Updating BIOS can help with compatibility and stability for updates.

1. Find Your HP Model
   • Press F2 or Esc at startup → System Information.
2. Download Latest BIOS 👉 Official HP® Support
3. Install BIOS Update
   • Run the downloaded file in Windows.
   • Do not power off during update.

Take care and have an amazing day ahead! 🚀

Best regards,

Pallipurath