How to Fix Microsoft Office Error code 5-26?

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Symptoms of Error Code-

  1. You will get errors while installing/updating Microsoft Office
  2. Slow Overall System Performance
  3. Ms. Office Application Will stop working.

Cause of 5-6 Error Code-

  1. Corrupt Office apps
  2. Windows Firewall Issue
  3. Junk store location is infected with active threat

Methods to resolve this error-

Method-1  System File Checking or SFC Scan to fix Error code 5-26

System file checker tool is an advanced mechanism to check and verify the missing and corrupted system files in the operating system. This utility will allow the windows to scan and restore the missing/corrupted files.

If windows resource protection files are missing, your computer may not work properly and it may go malfunctioning such as software installation may throw up errors, the computer may crash or restart frequently.

Follow the steps to run System File checker tool or sfc.exe
  1. Click on windows key
  2. Search for command prompt or cmd
  3. Right click and run the command prompt as administrator.
  4. If prompted for administrator password or confirmation click password or click allow.
  5. Once the command prompt is open, type the following command and click enter

SFC /SCANNOW

The SFC /SCANNOW command will scan and verify all protected system files in the computer and restore the corrupted files with a cached copy on the computer located at %WinDir%\System32\dllcache which represents Windows system folder.

Sfc scan to fix error code 5-26

Note: Do not close the command prompt until the verification is 100% complete.

  1. Check whether Error code 5-26 is fixed once the SFC scan is completed.

Method-2  Make a temporary exception on Firewall or Antivirus to Fix Error Code 5-26

The Firewall or Antivirus installed on the computer may sometimes detect and auto-delete execution file of Microsoft Office as a part of system security in the background. The Office installer is an online setup in order to provide the latest features and updates in each and every installation.

The Antivirus software such as McAfee, Norton, Bit Defender, AVG, Kaspersky, Panda, Avast or Webroot installed on the computer works as a high-security firewall in protecting from the virus, spyware, Trojan horses and malware components entering the computer from external sources such as internet and external drives such USB and Ext HDD. This security protection will also check and verify the contents from the internet. And if the security level is set as High or Strong, it will not allow any execution over the internet for security reasons. Hence it might also block the online installation of Microsoft Office 365 or Office 2016 or Office 2013.

Following given are the steps to temporarily disable firewall or Antivirus to Fix Error Code 5-2

a) To disable Windows Firewall:

  1. Click on start button and select control panel.
  2. In search box type firewall and Click on windows Firewall.
  3. In the left pane, click on Turn Windows firewall OFF or ON.
  4. Click on Turn OFF Firewall.
  5. Check whether Error code 5-26 is fixed once the firewall is turned OFF.

b) To disable McAfee Antivirus

  1. Check for McAfee indication icon on right side of the taskbar.
  2. Right click on the indication icon and select Real Time scanning.
  3. Click on TURN OFF in real time scanning option.
  4. Select Firewall in McAfee navigation pane.
  5. Click on TURN OFF in firewall menu.
  6. Check whether Error code 5-26 is fixed after disabling Antivirus.

c) To disable AVG Antivirus

  1. Open AVG program and Click on Advanced settings option.
  2. From the drop-down menu, select temporarily disable AVG protection.
  3. Choose the time to disable AVG.
  4. Choose disable the firewall protection and Click OK.
  5. Check whether Error code 5-26 is fixed after disabling Antivirus.

d) To disable Norton Antivirus

  1. Right-click the Norton Antivirus icon win windows task bar and click Disable smart Firewall.
  2. Click Disable Antivirus Auto-Protect.
  3. Choose the time to disable the program.
  4. Check whether Error code 5-26 is fixed after disabling Antivirus.

e) To disable BitDefender Antivirus

  1. Double click on the BitDefendericon in the lower right corner of the desktop.
  2. Click Virus shield on the left side.
  3. Uncheck the Virus shield option to turn off BitDefender.
  4. Check whether Error code 5-26 is fixed after disabling Antivirus.

f) To disable Panda Antivirus

  1. Open Panda Antivirus
  2. Click on virus shield
  3. 3. Set the control OFF position to disable Panda Antivirus.
  4. Check whether Error code 5-26 is fixed after disabling Antivirus.

g) To disable Webroot Antivirus

  1. Open system try, right clicks on the secureAnyWhere icon of webroot.
  2. Select Shut-Down protection.
  3. Click YES on confirmation prompt and enter CAPTCHA if required for confirmation.
  4. Check whether Error code 5-26 is fixed after disabling Antivirus.

h) To disable Avast Antivirus

  1. Click on Avast icon from notification area of windows task bar.
  2. Click on Avast shield control.
  3. Select disable for 10 minutes.
  4. Click YES on confirmation prompt.
  5. Check whether Error code 5-26 is fixed after disabling Antivirus.

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