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80003fa Office 365

80003fa Error Code Office 365 Information
Difficulty LevelMedium
Resolution:System Fix
Cause:Malwares/Virus
Affected Operating Systems
  • Windows 8/8.1
  • Windows 7
  • Windows 10
  • Windows Vista

How To Fix 80003fa Error Code in Office 365

Repair Difficulty : Critical

Step 1: Disable Windows Firewall

For Microsoft Windows 7 and later

1) Press “Win + R” and Type “Firewall.cpl” and Press Enter.
Office Error Code 80003fa Office 365 img7
2) Microsoft Windows Firewall Window will Open.
3) On left hand side you will find “Turn Windows Firewall on or off”
Office Error Code 80003fa Office 365 img7
Note: If you are logged in as Normal user you may be asked to
Office Error Code 80003fa Office 365 img5
4) Press “Turn Off Windows Firewall” under each network location and then Click “OK”

Warning: Please Activate Windows Firewall after Office 365 installation is complete.

Step 2: Proxy Issue

1) Open Control Panel.
Microsoft Windows 7 : Click On Start and then Select Control Panel from Right Pane.
Microsoft Windows 8 : Press Windows Key + Q and Type “Control” And Click on it.
2) Open “Internet Options” In Control Panel .
3) Click On Connections Tab and then Press LAN Setting.
Office Error Code 80003fa Office 365 img 11
4) Uncheck “Use a proxy server for your LAN” if its switched ON.

Step 3: Check System Integrity

1) Press Windows + R
Office Error Code 80003fa Office 365 img14
2) Type “cmd” and Press Enter.
Office Error Code 80003fa Office 365
3) Type “sfc /scannow” and press enter.
Office Error Code 80003fa Office 365 img18
Note: If you are logged in as Guest user you will be asked to login as Administrator.

Step 4: Try the installation again

In most case 80003fa 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