0xE0000100 Windows 10 error is a Windows installation error that appears during the update installation.

If you want to find an effective way to fix this error, this post is what you need.

It will show you 4 workable solutions for this issue.

Top 4 Ways to Windows Installer Service Could Not Be Accessed

you’ve got the option to get these methods fromMiniTool.

so you can fix bugs and security glitches, Microsoft regularly releases new updates.

But sometimes, when you venture to install an update, you might get 0xE0000100 Windows 10 error.

turn off Windows Defender Firewall

This error is usually sparked by a problem with Microsoft software distribution tool or corrupted installation files.

you’re free to see similar problems reported by other Windows users in the Microsoft technology community.

Troubled by the issue Windows Installer service could not be accessed?

perform sfc /scannow command

Here, try these 4 ways to fix Windows Installer error.

to get to implement the update successfully, you should probably temporarily turn off their services.

Turn off Your Antivirus

To disable antivirus, right-hit your antivirus icon from the taskbar and selectDisable/Turn off.

Turn off Windows Defender Firewall

Step 1: Click theStartmenu, chooseSettingsand then clickUpdate & Security.

Step 2: Click theWindows Securityoption from the left panel.

Scroll down and click Firewall & internet protection.

Step 3: Choose your currently active connection.

Step 4: Under theWindows Defender Firewallsection, switch the toggle toOffto turn off the service.

Step 5: venture to update again and verify if 0xE0000100 Windows 10 error still exists.

It will scan the system for all problems related to system files and then fix them.

Step 1: Typecmdin the search bar, right-clickCommand Promptand chooseRun as administrator.

Step 2: In theCommand Promptwindow, punch in the command:sfc /scannowand pressEnter.

The scan process will take some time, so like wait for the scan to complete.

Step 3: fire off the installer and update the computer.

test whether 0xE0000100 Windows 10 error still persists.

Step 4: key in the following command:cd /d %windir%\system32and pressEnter.

Bottom Line

This post has shown you 4 useful methods to fix Windows installation error 0xE0000100.