0x800b0100-0 Office 365

0x800b0100-0 Error Code Office 365 Overview
Difficulty LevelVery High
Resolution:Manual
Cause:Application Layer Corrupt
Affected Operating Systems
  • Windows 8/8.1
  • Windows 7
  • Windows 10
  • Windows Vista

How To Fix 0x800b0100-0 Error Code in Office 365

Repair Difficulty : High

Step 1: Disable Firewall

For Windows 7 and later

1) Press “Win + R” and Type “Firewall.cpl” and Press Enter.
Office Error Code 0x800b0100-0 Office 365 img7
2) Microsoft Windows Firewall Window will Open.
3) Press “Turn Windows Firewall on or off”
Office Error Code 0x800b0100-0 Office 365 img7
Warning: If you are logged in as Normal user you may be asked to login as Administrator.
Office Error Code 0x800b0100-0 Office 365 img5
4) Finally Click on “Turn off Windows Firewall (not recommended)” under each of the active network connections.

Warning: You can activate Microsoft Windows Firewall after Office 365 installation is complete.

Step 2: Check Proxy Setting Issue

1) Goto Control Panel.
Microsoft Windows 7 : Click Start and then Select Control Panel from Right Pane.
Microsoft Windows 8 : Press Windows Key + Q and Type “Control” And Click on it.
2) In Search Box Type Internet and Click on “Internet Options”.
3) Select Connections Tab and then Choose LAN Setting.
Office Error Code 0x800b0100-0 Office 365 img 11
4) Uncheck “Use a proxy server for your LAN” if its switched ON.

Step 3: Check System Integrity

1) Press Win + R
Office Error Code 0x800b0100-0 Office 365 img14
2) Type cmd and Press Enter.
Office Error Code 0x800b0100-0 Office 365
3) Type “sfc /scannow” and press enter.
Office Error Code 0x800b0100-0 Office 365 img18
Note: If you are logged in as Normal user you will be asked to

Step 4: Try the installation again

In most case 0x800b0100-0 error code in Office 365 should be resolved by now, if however the problem still persists please get your system checked by an expert.

If you are not able to resolve the issue following above steps, you can contact our 24×7 Chat Support for help.

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  • January 1st, 1970

    Posted In: Office 365

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