A How-to guide on solving Windows Update Error Code 800b0100

(Error Code 800b0100 Windows could not search for updates.)
Read our guide on solving Windows Error Code 800b0100 and use these tips. It will help you to troubleshoot your issue.

What happens

You receive this error when you try to install updates for Windows Vista or the windows 7 operating system.

What you should do in the case of Windows Update error #800b0100

The main cause of this error is improperly registered Windows security .dll files and there are a few troubleshooting techniques you can use to try to resolve the error.

You can solve the error by using the System Update Readiness Tool which Microsoft released for the sole purpose of clearing up problems when installing updates. You can download the tool by clicking on Start on the main toolbar and then choose Control PanelSecurity and then chooseCheck for Updates located under Windows Update. The System Readiness Tool helps to verify that directory files are correct and checks the registry data under registry subkeys.

You can also try re-registering the wintrust.dll file by clicking on Start on your main toolbar and then choosing Run from the menu. Enter regsvr32 wintrust.dll /s and then press the Enter key. Return to the command prompt and enter cmd to open the command prompt window and enter net stop cryptsvc and then press the Enterkey. Follow the same procedure by entering ren %systemroot%\system32\catroot2 oldcatroot2 and thennet start cryptsvc and then exit the command prompt. Try installing Windows Update again.

TipFor more information, please see: How to fix Update error #800b0100