80071-90 Office 365

80071-90 Error Code Office 365 Overview
Difficulty LevelMedium
Resolution:DLL Issue
Cause:System Level Conflict
Affected Operating Systems
  • Windows 8/8.1
  • Windows 7
  • Windows 10
  • Windows Vista

How To Fix 80071-90 Error Code in Office 365

Repair Difficulty : Critical

Step 1: Disable Microsoft Windows Firewall

For Microsoft Windows 8

1) Press “Win + R” and Type “Firewall.cpl” and Press Enter.
Office Error Code 80071-90 Office 365 img 8
2) Microsoft Windows 8 Firewall Window will Open.
Office Error Code 80071-90 Office 365
3) Tap On “Turn Windows Firewall on or off”
Office Error Code 80071-90 Office 365 img 9
Note: If you are logged in as Guest user you will be asked to login as Administrator.
Office Error Code 80071-90 Office 365 img10
4) Finally Click on “Turn off Windows Firewall (not recommended)” under each of the active network connections.
Office Error Code 80071-90 Office 365 img11

Step 2: Check Proxy Setting Issue

1) Open Control Panel.
Microsoft Windows 7 : Press Win Key and then Select Control Panel from Right Pane.
Microsoft Windows 8 : Press Windows key + R and type “Control” and Press Enter.
Office Error Code 80071-90 Office 365 img 9
2) In Search Box Type Internet and Click on “Internet Options”.
3) Select Connections Tab and then Choose LAN Setting.
Office Error Code 80071-90 Office 365 img 11
4) Turn off “Use a proxy server for your LAN” if its already ON.

Step 3: Run System Scan

1) Press Windows + R
Office Error Code 80071-90 Office 365 img14
2) Type “cmd” and Press Enter.
Office Error Code 80071-90 Office 365
3) Type “sfc /scannow” and press enter.
Office Error Code 80071-90 Office 365 img18
Note: You will need Admin rights to run the sfc command.

Step 4: Try the installation again

In most case 80071-90 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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