1303 Office 365

1303 Error Code Office 365 Overview
Difficulty LevelMedium
Resolution:Manual
Cause:Software Level Conflict
Affected Operating Systems
  • Windows 8/8.1
  • Windows 7
  • Windows 10
  • Windows Vista

How To Fix 1303 Error Code in Office 365

Repair Difficulty : High

Step 1: Disable Windows Firewall

For Microsoft Windows 8

1) Press “Win + R” and Type “Firewall.cpl” and Press Enter.
Office Error Code 1303 Office 365 img 8
2) Microsoft Windows 8 Firewall Window will Open.
Office Error Code 1303 Office 365
3) Click On “Turn Windows Firewall on or off”
Office Error Code 1303 Office 365 img 9
Note: You will need Administrator privileges to enable or disable Windows firewall.
Office Error Code 1303 Office 365 img10
4) Under “Home or Work Network Location Settings” And “Public Network Location Settings” Click On “Turn Off Windows Firewall”
Office Error Code 1303 Office 365 img11

Step 2: Check Proxy Setting

1) Open Control Panel.
Windows 7 : Click Start and then Click On Control Panel from Right Pane.
Microsoft Windows 8 : Press Windows key + R and type “Control” and Press Enter.
Office Error Code 1303 Office 365 img 9
2) In Control Panel Window Click on “Internet Options”.
3) Select Connections Tab and then Click On LAN Setting.
Office Error Code 1303 Office 365 img 11
4) Turn off “Use a proxy server for your LAN” if its switched ON.

Step 3: Run System Scan

1) Press Windows + R
Office Error Code 1303 Office 365 img14
2) Type cmd and Press Enter.
Office Error Code 1303 Office 365
3) Type “sfc /scannow” and press enter.
Office Error Code 1303 Office 365 img18
Note: If you are logged in as Normal user you may be asked to

Step 4: Try the installation again

In most case 1303 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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