Windows Update Error 800B0100: 7 Quick Fixes

Learn what you need to to do resume update installations

4 min. read

Updated onOctober 4, 2023

updated onOctober 4, 2023

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Key notes

Some users have posted on support forums about a Windows error code 800B0100 issue that arises when they try to install updates.

The error message for that issue looks like this:

Windows Update encountered an unknown error code 800b0100.

Consequently, Windows doesn’t install updates when that issue arises. Read on to find out how to solve this error code on your PC.

How can I fix the error code 800B0100?

1. Run the Windows Update Troubleshooter

2. Disable Windows’ firewall

3. Disable third-party antivirus software

If you have installed third-partyantivirus software, try disabling that utility to ensure it’s not conflicting with the update service.

Right-click the system tray icon for your antivirus utility to open its context menu. Then look for and select a context menu option that will temporarily disable the antivirus shield.

4. Clear the SoftwareDistribution folder

5. Run a system file scan

6. Disable proxy server

7. Re-register the Wintrust.dll

Those are some of the fixes that can feasibly resolve error code 800B0100.

Note, however, that you can also manually install updates from theMicrosoft Update Catalog.

Enter the update code for the update you can’t install in the search box there to download and install it.

Windows Update Error 800B0100: 7 Quick Fixes#

How can I fix the error code 800B0100?#

1. Run the Windows Update Troubleshooter#

2. Disable Windows’ firewall#

3. Disable third-party antivirus software#

4. Clear the SoftwareDistribution folder#

5. Run a system file scan#

6. Disable proxy server#

7. Re-register the Wintrust.dll#