5-26 Error Code Office 365 Information
|Affected Operating Systems|
- Windows 8/8.1
- Windows 7
- Windows 10
- Windows Vista
How To Fix 5-26 Error Code in Office 365
Repair Difficulty : Medium
For Microsoft Windows 8
1) Press Win key + Q. A search box will come up on right hand side.
2) Open “Windows Firewall” from Control Panel Window
3) Press “Turn Windows Firewall on or off”
Warning: If you are logged in as Guest user you will be asked to enter Admin Password
4) Click Turn off Windows Firewall (not recommended) under each network
location and then Click “OK”
Step 2: Temporarily turn off Proxy Settings
1) Open Control Panel. Microsoft Windows 7 :
Click On Start and then Select Control Panel from Right Pane. Microsoft Windows 8 :
Press Windows key + R and type “Control” and Press Enter.
2) In Control Panel Window Click on “Internet Options”.
3) Click On Connections Tab and then Click On LAN Setting.
4) Uncheck “Use a proxy server for your LAN” if its switched ON.
Step 3: Check System Integrity
1) Press Windows + R
2) Type cmd
and Press Enter.
3) Type “sfc /scannow”
and press enter. Note:
If you are logged in as Normal user you may be asked to enter Admin Password
Step 4: Try the installation again
In most case 5-26 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.
Posted In: Office 365