How to Fix Error Code 3088-26

Symptoms of Error Code 3088-26

  • Problem during Microsoft Office Installation
  • Computer may freeze during while installing
  • Internet Speed will become slow

Causes of Microsoft Error Code 3088-26

  • Corrupt Windows Files
  • Incomplete office installation
  • Virus/Malware issue.

Operation System Information :
This error can occur in following version of Microsoft Operating System :

  • Windows 8/8.1
  • Windows 7
  • Windows XP

How To Fix Microsoft Office Error 3088-26

Repair Difficulty : Difficult

Step 1 : Check Proxy Setting for any Conflict

1) Goto Control Panel

For Windows 7 : Click Start and then Click On Control Panel from Right window.
For Windows 8 : Press Windows key + R and type “Control” and Press Enter.

2) In Search Box Type Internet and Click on “Internet Options”.
3) Select Connections Tab and then Click On LAN Setting.

4) Untick “Use a proxy server for your LAN” if its already ON.

Step 2 : Repair Windows System Files

1) Press Win button + R

2) Type “cmd” and Press Enter.

3) Type “sfc /scannow” and press enter.

Note: You will need Administrator rights to run the command.

Step 3: Disable Windows Firewall

1) Press “Windows Button+ R” and Type “Firewall.cpl” and Press Enter.

2) Windows 8 Firewall Window will Open.
3) Press “Turn Windows Firewall on or off”

Warning: You will need Admin rights to enable or disable Windows firewall.


4) Finally Click on “Turn off Windows Firewall (not recommended)” under each of the active network connections.

Step 4 : Try Microsoft Office installation Again.

Microsoft Office 3088-26 error code should be resolved by now. If the error still persists we recommend to get your system check up by an expert.

If you still need any help , Chat with our Technical Support Team to resolve the issue.

office technical support

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