1603 Office 365

1603 Error Code Office 365 Overview
Difficulty LevelMedium
Resolution:Manual
Cause:System Integrity Issue
Affected Operating Systems
  • Windows 8/8.1
  • Windows 7
  • Windows 10
  • Windows Vista

How To Fix 1603 Error Code in Office 365

Repair Difficulty : Critical

Step 1: Disable Microsoft Windows Firewall

For Windows 8

1) Press “Win + R” and Type “Firewall.cpl” and Press Enter.
Office Error Code 1603 Office 365 img 8
2) Microsoft Windows 8 Firewall Window will Open.
Office Error Code 1603 Office 365
3) Press “Turn Windows Firewall on or off”
Office Error Code 1603 Office 365 img 9
Note: If you are logged in as Normal user you will be asked to
Office Error Code 1603 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 1603 Office 365 img11

Step 2: Reset Internet Explorer Security settings

1. Now, click on Start button.

start
2. Type the command “inetcpl.cpl” and click OK.
3. Click on the “Security” tab.

inetcpl security
4. Click “Reset all zones to default level” button at the bottom of the window.
5. Click OK again.

Step 3: Disable Antivirus

– Open Your Antivrus software
– Disable it till the Office 365 installation is going on. Check manufacturer website for more details.

Step 4: Try the installation again

In most case 1603 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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  • Posted In: Office 365