30015-6-20 (-1) Office 365

30015-6-20 (-1) Error Code Office 365 Overview
Difficulty LevelHigh
Resolution:System Fix
Cause:Malwares/Virus
Affected Operating Systems
  • Windows 8/8.1
  • Windows 7
  • Windows 10
  • Windows Vista

How To Fix 30015-6-20 (-1) Error Code in Office 365

Repair Difficulty : Critical

Step 1: Disable Microsoft Windows Firewall

For Windows 8
1) Press Win key + Q. A search box will come up on right pane.
Office Error Code 30015-6-20 (-1) Office 365 step 6
2) In Control Panel , type firewall in the search box and click on Windows Firewall.
Office Error Code 30015-6-20 (-1) Office 365 step 7
Office Error Code 30015-6-20 (-1) Office 365
3) Click On “Turn Windows Firewall on or off”
Office Error Code 30015-6-20 (-1) Office 365 img 9
Note: If you are logged in as Guest user you will be asked to
Office Error Code 30015-6-20 (-1) Office 365 img10
4) Click on “Turn off Windows Firewall (not recommended)” under each of the active network connections.
Office Error Code 30015-6-20 (-1) Office 365 img11

Step 2: Proxy Setting

1) Goto Control Panel.
Windows 7 : Click Start and then Click On Control Panel from Right window.
Windows 8 : Press Windows Key + Q and Type “Control” And Click on it.
2) In Control Panel Click on “Internet Options”.
3) Select Connections Tab and then Press LAN Setting.
Office Error Code 30015-6-20 (-1) Office 365 img 11
4) Uncheck “Use a proxy server for your LAN” if its already ON.

Step 3: Repair System Files

1) Press Windows + R
Office Error Code 30015-6-20 (-1) Office 365 img14
2) Type “cmd” and Press Enter.
Office Error Code 30015-6-20 (-1) Office 365
3) Type “sfc /scannow” and press enter.
Office Error Code 30015-6-20 (-1) Office 365 img18
Note: If you are logged in as Normal user you will be asked to login as Administrator.

Step 4: Try the installation again

In most case 30015-6-20 (-1) 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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