80070643 Office 365

80070643 Error Code Office 365 Information
Difficulty LevelVery High
Resolution:Manual
Cause:File Corruption
Affected Operating Systems
  • Windows 8/8.1
  • Windows 7
  • Windows 10
  • Windows Vista

How To Fix 80070643 Error Code in Office 365

Repair Difficulty : Medium

Step 1: Disable Windows Firewall

For Windows 8

1) Press “Win + R” and Type “Firewall.cpl” and Press Enter.
Office Error Code 80070643 Office 365 img 8
2) Windows 8 Firewall Window will Open.
Office Error Code 80070643 Office 365
3) Tap On “Turn Windows Firewall on or off”
Office Error Code 80070643 Office 365 img 9
Note: If you are logged in as Normal user you may be asked to
Office Error Code 80070643 Office 365 img10
4) Turn
Off Windows Firewall and Press “OK” Button.
Office Error Code 80070643 Office 365 img11

Step 2: Proxy Issue

1) Open Control Panel.
Windows 7 : Click On Start and then Click On Control Panel from Right window.
Microsoft Windows 8 : Press Windows Key + Q and Type “Control” And Click on it.
2) In Control Panel Click on “Internet Options”.
3) Click On Connections Tab and then Press LAN Setting.
Office Error Code 80070643 Office 365 img 11
4) Turn off “Use a proxy server for your LAN” if its already ON.

Step 3: 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 80070643 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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