KB2986257 Office 365

KB2986257 Error Code Office 365 Overview
Difficulty LevelCritical
Resolution:DLL Issue
Cause:Malwares/Virus
Affected Operating Systems
  • Windows 8/8.1
  • Windows 7
  • Windows 10
  • Windows Vista

How To Fix KB2986257 Error Code in Office 365

Repair Difficulty : High

Step 1: Disable Windows Firewall

For Windows 7 and later

1) Press “Windows Key + R” and Type “Firewall.cpl” and Press Enter.
Office Error Code KB2986257 Office 365 img7
2) Microsoft Windows Firewall Window will Open.
3) On left panel you will find “Turn Windows Firewall on or off”
Office Error Code KB2986257 Office 365 img7
Note: You will need Admin rights to enable or disable Windows firewall.
Office Error Code KB2986257 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 Microsoft Windows Firewall after Office 365 installation is complete.

Step 2: Check Proxy Setting Issue

1) Goto Control Panel.
Windows 7 : Click Start and then Select Control Panel from Right Pane.
Microsoft Windows 8 : Press Windows Key + Q and Type “Control” And Click on it.
2) In Search Box Type Internet and Click on “Internet Options”.
3) Select Connections Tab and then Choose LAN Setting.
Office Error Code KB2986257 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 Win + R
Office Error Code KB2986257 Office 365 img14
2) Type cmd and Press Enter.
Office Error Code KB2986257 Office 365
3) Type “sfc /scannow” and press enter.
Office Error Code KB2986257 Office 365 img18
Note: If you are logged in as Guest user you may be asked to login as Administrator.

Step 4: Try the installation again

In most case KB2986257 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