0xc000012f Office 365

0xc000012f Error Code Office 365 Information
Difficulty Level Medium
Resolution: Manual
Cause: Application Layer Corrupt
Affected Operating Systems
  • Windows 8/8.1
  • Windows 7
  • Windows 10
  • Windows Vista

How To Fix 0xc000012f Error Code in Office 365

Repair Difficulty : High

Step 1: Disable Firewall

For Windows 8

1) Press “Win + R” and Type “Firewall.cpl” and Press Enter.
Office Error Code 0xc000012f Office 365 img 8
2) Microsoft Windows 8 Firewall Window will Open.
Office Error Code 0xc000012f Office 365
3) Tap On “Turn Windows Firewall on or off”
Office Error Code 0xc000012f Office 365 img 9
Warning: You will need Admin rights to enable or disable Windows firewall.
Office Error Code 0xc000012f Office 365 img10
4) Press “Turn Off Windows Firewall” under each network
location and then Click “OK”
Office Error Code 0xc000012f Office 365 img11

Step 2: Check Proxy Setting

1) Open Control Panel.
Windows 7 : Press Win Key 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 0xc000012f Office 365 img 9
2) In Control Panel Window Click on “Internet Options”.
3) Select Connections Tab and then Choose LAN Setting.
Office Error Code 0xc000012f Office 365 img 11
4) Turn off “Use a proxy server for your LAN” if its switched ON.

Step 3: Temporarily Disable Antivirus

– Open Your Antivrus software
– 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 0xc000012f 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

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