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How to Fix Error Code 866

Microsoft Office error codes can occur while downloading, installing, opening (launching), updating, closing or while performing any actions like receiving, copying, pasting, sending etc. Other language references: Fejlkode, felkod, código de error, cod de eroare, feil kode, codice di errore, Fehlercode, code d’erreur, Virhekoodi, foutcode

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This indicates an error with the Internet or the local machine.  Issues with Internet can be due to intermittent connectivity, low speed, modem or router configuration, ISP (Internet Service Provider) restrictions, local machine configuration issues etc. Local machine errors happen when the computer has applications, Windows, drivers etc, which are not up to date and even if the computer is not tuned up to its performance causing corrupt files, directories, registry and other data affecting the hard drive.

A. Cleaning temp folder

Microsoft Office Error Solution Using Temp

  1. Press and hold the Windows key and the letter ‘R’ together.
  2. When the Run window pops, enter the text “temp”, without quotes, and hit Enter key.
  3. Now, the Windows Explorer with the temporary system files location open.
  4. Click on any file or folder in the Window and then press and hold the ‘CTRL’ and alphabet ‘A’ together.

Microsoft Run Command Dialog For Temp

  1. Now, right click the highlighted files.
  2. While holding down the ‘Shift’ key, select the option “Delete” from the pop up menu.

MS User Access Control During MS Office Resolution

  1. If a pop up offers to click on ‘Yes’ or ‘Allow’ or ‘Continue’, select the check box to the left bottom corner of the pop up and then click on the visible button mentioned.
    MS Alert for Deletion For MS Office SupportMicrosoft Access Denied During MS Resolution
  2. Repeat the step 7. If the pop ups continue for more than a few times, select the option to the left bottom corner of the pop up window and select ‘Skip’ and repeat the same.
  3. Once deleting is complete, you may close the Temp folder window and continue to next step.

B. Cleaning %temp% folder

MS Office Resolution via Temp Files

The steps to clean the user related junk files is to follow the same steps above to clean the temp folder as above, where the command ‘temp’ is replaced with “%temp%”, without quotes.

C. Clean Up System Files

  1. Press the Windows key and the ‘R’ key together to open the Run command window.
  2. Now, enter the text “cleanmgr”, without quotes.MS Clean Manager For Office Resolution
  3. Then, select the hard drive partition from the drop down in the pop up window and click on ‘OK’ button.
    MS Windows Cleaning
  4. Once the scan for junk data is complete, select the items from the list, except the Recycle Bin.
    MS Clean Manager For Office Error Resolve
  5. Click on ‘OK’ button and wait for the operation to complete.

D. Clearing Internet Explorer junk files

  1. Press and hold the Windows key and the letter ‘R’ at once.
  2. In the Run window, enter the command ‘inetcpl.cpl’ and then hit Enter key.MS Internet Property Resolution for Outlook Support
  3. Now, click on the ‘Advanced’ tab on the Internet Options window.
    microsoft Internet Advance Property For Windows Support and Resolutions
  4. Then, click on the reset button.
  5. Now, select the option to delete the personal settings in the pop up window.MS Alert for Deletion For MS Office Support

Wait for the reset to complete and then continue to the next step.

Now, you may check if the issue is fixed.

If by any change, the error is not fixed, then the issue is critical and data loss can occur. A single corrupt component can affect the hardware and software.

Now, to make the troubleshooting easier, feel free to click on the pop up on this page or the floating chat icon to the right to initiate a troubleshooting session assisted by professional and friendly experienced tech support agent.

Microsoft Chat Support

Click on the image above to start chatting with a professional to get instant fix.

 

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  • December 24th, 2016

    Posted In: Microsoft Office Error Code