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801811a5 Office 365

801811a5 Error Code Office 365 Information
Difficulty LevelHigh
Resolution:System Fix
Cause:System Integrity Issue
Affected Operating Systems
  • Windows 8/8.1
  • Windows 7
  • Windows 10
  • Windows Vista

How To Fix 801811a5 Error Code in Office 365

Repair Difficulty : Critical

Step 1: Disable Firewall

For Windows 7 and later

1) Click Start Button Office Error Code 801811a5 Office 365 Img3 or Simply Press Win key and in right pane Click on Control Panel.
Office Error Code 801811a5 Office 365 img5
2) In Control Panel Window, type firewall in the search box and click on Windows Firewall.
Office Error Code 801811a5 Office 365 img6
3) Click On “Turn Windows Firewall on or off”
Office Error Code 801811a5 Office 365 img7
Warning: You will need Admin rights to enable or disable firewall.
Office Error Code 801811a5 Office 365 img5
4) Click on “Turn off Windows Firewall (not recommended)” under each of the active network connections.

Warning: You can activate Microsoft Windows Firewall after Office 365 repair is complete.

Step 2: Reset Internet Explorer Security settings

1. Now, tap on Start.

start
2. Enter the command “inetcpl.cpl” and click OK button.
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 button.

Step 3: Disable Antivirus

– Open Your Antivrus
– Disable it till the Office 365 repair is going on. Check vendor website for more details.

Step 4: Try the installation again

In most case 801811a5 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