How to fix Windows activation error 0x800705B4

The error code 0x800705B4 often appears during Windows activation or update processes, usually indicating that the activation server is unreachable or an issue with Windows Update. Here are a few steps you can try to resolve this:

1. Check Internet Connection

Ensure your internet connection is stable. A weak connection may prevent Windows from reaching activation servers.

2. Run the Windows Activation Troubleshooter

• Open Settings > Update & Security > Activation.
• Click on Troubleshoot and follow the on-screen instructions.
• The troubleshooter can identify and fix many activation issues automatically.

3. Check for Windows Updates

• Go to Settings > Update & Security > Windows Update.
• Click on Check for updates. Sometimes installing updates resolves activation errors.

4. Run SFC and DISM Commands

• Open Command Prompt as Administrator.
• Type sfc /scannow and press Enter. This will scan for system file issues and attempt repairs.
• Next, type: DISM /Online /Cleanup-Image /RestoreHealth and press Enter. This command repairs the Windows image, which can fix underlying system issues that cause activation errors

5. Reactivate Windows via Command Prompt

• Open Command Prompt as Administrator.
• Type the following commands one by one, pressing Enter after each:
  slmgr.vbs /upk


  slmgr.vbs /ipk <Your Product Key>


  slmgr.vbs /ato

• Replace <Your Product Key> with your Windows 10 Home product key. This will attempt to reactivate Windows.

6. Check the Time and Date Settings

• Go to Settings > Time & Language > Date & Time.
• Ensure the time, date, and region settings are correct. Incorrect settings can interfere with activation.

If none of these steps work, try contacting Microsoft Support. They may be able to assist further if server-side issues are affecting your activation.