255-11 Office 365

255-11 Error Code Office 365 Overview
Difficulty LevelCritical
Resolution:DLL Issue
Cause:Software Level Conflict
Affected Operating Systems
  • Windows 8/8.1
  • Windows 7
  • Windows 10
  • Windows Vista

How To Fix 255-11 Error Code in Office 365

Repair Difficulty : Medium

Step 1: Disable Windows Firewall

For Windows 7 and later

1) Open Control Panel Window (Click Start Office Error Code 255-11 Office 365 img4 and press “Control Panel” Button on Right Side)
Office Error Code 255-11 Office 365 img5
2) In Control Panel Window, Open “Windows Firewall”.
Office Error Code 255-11 Office 365 img6
3) Click On “Turn Windows Firewall on or off”
Office Error Code 255-11 Office 365 img7
Note: If you are logged in as Normal user you may be asked to login as Administrator.
Office Error Code 255-11 Office 365 img5
4) Under “Home or Work Network Location Settings” And “Public Network Location Settings” Click On “Turn Off Windows Firewall”

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

Step 2: Reset Internet Explorer Security settings

1. Now, click on Start.

start
2. Enter 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 button.

Step 3: Check System Integrity

1) Press Windows + R
Office Error Code 255-11 Office 365 img14
2) Type “cmd” and Press Enter.
Office Error Code 255-11 Office 365
3) Type “sfc /scannow” and press enter.
Office Error Code 255-11 Office 365 img18
Note:
Step 3:Run Disk Cleanup Utility
1) Press Win + R
Office Error Code 255-11 Office 365
2) Type “Cleanmgr” and Press Enter.
Office Error Code 255-11 Office 365 img19
3) Select the OS Drive and Press OK.
4) Finally Click on Clean up System Files

Step 4: Try the installation again

In most case 255-11 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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