75550 Office 365

75550 Error Code Office 365 Overview
Difficulty LevelVery High
Resolution:Manual
Cause:Software Level Conflict
Affected Operating Systems
  • Windows 8/8.1
  • Windows 7
  • Windows 10
  • Windows Vista

How To Fix 75550 Error Code in Office 365

Repair Difficulty : Medium

Step 1: Disable Windows Firewall

For Microsoft Windows 7 and later

1) Press Win+R button and Type “Control” followed by Enter key.
Office Error Code 75550 Office 365 img5
2) In Control Panel , type firewall in the search box and click on “Windows Firewall”.
Office Error Code 75550 Office 365 img6
3) Click On “Turn Windows Firewall on or off”
Office Error Code 75550 Office 365 img7
Note: If you are logged in as Guest user you will be asked to enter Admin Password
Office Error Code 75550 Office 365 img5
4) Under “Home or Work Network Location Settings” And “Public Network Location Settings” Click On “Turn Off Windows Firewall”

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

Step 2: Temporarily turn off Proxy Settings

1) Open Control Panel.
Windows 7 : Click On 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 75550 Office 365 img 9
2) In Control Panel Window Click on “Internet Options”.
3) Click On Connections Tab and then Click On LAN Setting.
Office Error Code 75550 Office 365 img 11
4) Uncheck “Use a proxy server for your LAN” if its switched ON.

Step 3: Repair System Files

1) Press Windows + R
Office Error Code 75550 Office 365 img14
2) Type “cmd” and Press Enter.
Office Error Code 75550 Office 365
3) Type “sfc /scannow” and press enter.
Office Error Code 75550 Office 365 img18
Note: You will need Administrator rights to run the command.

Step 4: Try the installation again

In most case 75550 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