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3088-26 Office 365

3088-26 Error Code Office 365 Information
Difficulty LevelMedium
Resolution:Manual
Cause:System Integrity Issue
Affected Operating Systems
  • Windows 8/8.1
  • Windows 7
  • Windows 10
  • Windows Vista

How To Fix 3088-26 Error Code in Office 365

Repair Difficulty : Critical

Step 1: Disable Windows Firewall

For Windows 8
1) Press Windows Button and Type Control Panel and Press Enter.
Office Error Code 3088-26 Office 365 step 6
2) Open “Windows Firewall” from Control Panel Window
Office Error Code 3088-26 Office 365 step 7
Office Error Code 3088-26 Office 365
3) On left pane you will find “Turn Windows Firewall on or off”
Office Error Code 3088-26 Office 365 img 9
Note: If you are logged in as Normal user you will be asked to
Office Error Code 3088-26 Office 365 img10
4) Turn
Off Windows Firewall and Press “OK” Button.
Office Error Code 3088-26 Office 365 img11

Step 2: Proxy Setting

1) Open Control Panel.
Windows 7 : Click Start and then Select Control Panel from Right Pane.
Windows 8 : Press Windows Key + Q and Type “Control” And Click on it.
2) In Control Panel Window Click on “Internet Options”.
3) Click On Connections Tab and then Choose LAN Setting.
Office Error Code 3088-26 Office 365 img 11
4) Turn off “Use a proxy server for your LAN” if its switched ON.

Step 3: Disable Antivirus

– Open Your Antivrus
– 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 3088-26 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