1603(0x643) Office 365

1603(0x643) Error Code Office 365 Overview
Difficulty LevelHigh
Resolution:Manual
Cause:File Corruption
Affected Operating Systems
  • Windows 8/8.1
  • Windows 7
  • Windows 10
  • Windows Vista

How To Fix 1603(0x643) Error Code in Office 365

Repair Difficulty : Critical

Step 1: Disable Windows Firewall

For Microsoft Windows 8

1) Press “Windows Key + R” and Type “Firewall.cpl” and Press Enter.
Office Error Code 1603(0x643) Office 365 img 8
2) Microsoft Windows 8 Firewall Window will Open.
Office Error Code 1603(0x643) Office 365
3) Press “Turn Windows Firewall on or off”
Office Error Code 1603(0x643) Office 365 img 9
Note: If you are logged in as Guest user you may be asked to enter Admin Password
Office Error Code 1603(0x643) Office 365 img10
4) Click on “Turn off Windows Firewall (not recommended)” under each of the active network connections.
Office Error Code 1603(0x643) Office 365 img11

Step 2: Reset Internet Explorer Security settings

1. Now, tap on Start button.

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: Repair System Files

1) Press Win + R
Office Error Code 1603(0x643) Office 365 img14
2) Type “cmd” and Press Enter.
Office Error Code 1603(0x643) Office 365
3) Type “sfc /scannow” and press enter.
Office Error Code 1603(0x643) Office 365 img18
Note: You will need Administrator rights to run the sfc command.

Step 4: Try the installation again

In most case 1603(0x643) 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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    16030x643 Office 365

    16030x643 Error Code Office 365 Overview
    Difficulty LevelCritical
    Resolution:Manual
    Cause:Malwares/Virus
    Affected Operating Systems
    • Windows 8/8.1
    • Windows 7
    • Windows 10
    • Windows Vista

    How To Fix 16030×643 Error Code in Office 365

    Repair Difficulty : Medium

    Step 1: Disable Firewall

    For Windows 7 and later

    1) Press “Win + R” and Type “Firewall.cpl” and Press Enter.
    Office Error Code 16030x643 Office 365 img7
    2) Microsoft Windows Firewall Window will Open.
    3) Tap On “Turn Windows Firewall on or off”
    Office Error Code 16030x643 Office 365 img7
    Warning: If you are logged in as Normal user you may be asked to
    Office Error Code 16030x643 Office 365 img5
    4) Click on “Turn off Windows Firewall (not recommended)” under each of the active network connections.

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

    Step 2: Proxy Issue

    1) Open Control Panel.
    Microsoft Windows 7 : Click On Start and then Select Control Panel from Right window.
    Microsoft Windows 8 : Press Windows key + R and type “Control” and Press Enter.
    Office Error Code 16030x643 Office 365 img 9
    2) Open “Internet Options” In Control Panel Window.
    3) Select Connections Tab and then Press LAN Setting.
    Office Error Code 16030x643 Office 365 img 11
    4) Turn off “Use a proxy server for your LAN” if its already ON.

    Step 3: Run System Scan

    1) Press Win + R
    Office Error Code 16030x643 Office 365 img14
    2) Type “cmd” and Press Enter.
    Office Error Code 16030x643 Office 365
    3) Type “sfc /scannow” and press enter.
    Office Error Code 16030x643 Office 365 img18
    Note:
    Step 3:Check System Files For Error
    1) Press Windows + R
    Office Error Code 16030x643 Office 365
    2) Type “Cleanmgr” and Press Enter.
    Office Error Code 16030x643 Office 365 img19
    3) Select the OS Drive and Press OK.
    4) Click on Clean up System Files

    Step 4: Try the installation again

    In most case 16030×643 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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