How to fix
Windows Update Error Code 0x80070663
on Windows

When I try to install updates for Excel 2016 from Windows Store, I get the error 0x80070663. Could you please tell me what should I do to install the update successfully?

Feature,[ref en-1] security, and stability updates for Windows OS are equally important. Therefore, any obstacles during the installation of Windows updates have to be addressed immediately. One of the common Windows 10 update errors is marked with a numerical code 0x80070663.

The 0x80070663 error is related to Windows Update Installer. The error indicates the fact that the update package that the user opts for installing got corrupted during the installation process. In most of the cases, this problem occurs when installing updates for Ms Office[ref en-2] 365, 2013, and 2016. Those who use Windows 7, XP, Vista and other older Windows versions can fix the 0x80070663 error by upgrading to the newest Windows version.[ref en-3] 

However, this error may also mean that the Windows Update service is currently down. This may happen due to corrupted Windows update components, so one of the possible fixes would be to restart them. If the 0x80070663 error shows up when installing MS Excel updates only, then you may try to uninstall the Office pack and reinstall it. To help you sort this problem out, we’ll provide all applicable 0x80070663 error fixes.

Run Windows Update Troubleshooter

First of all, check if Windows Update service is working properly. For this purpose, you can use an in-built tool.

• Press Windows key + I and open Update & Security section.
• Select Troubleshoot and find Windows Update.
• Click Windows Update and select Run troubleshooter.

  

The scan may take up to 10 minutes. You should get a window with scan results and notification if Windows managed to fix the problems automatically.

Restart Windows Update components

• Right-click Windows key and select Command Prompt (Admin).
• If a UAC shows up, click OK to proceed.
• By typing the following commands you will stop BITS, Windows Update, Cryptographic, MSI Installer services. Don't forget to press Enter after each of them:
  net stop bits
  net stop wuauserv
  net stop appidsvc
  net stop cryptsvc

  

• Then type Del "%ALLUSERSPROFILE%\\Application Data\\Microsoft\\Network\\Downloader\\qmgr*.dat” command to delete qmgr*.dat files.
• Once done, copy and paste cd /d %windir%\\system32 command and press Enter to execute the command.
• To re-register BITS and Windows Update files, you will have to type all the commands (followed by Enter) provided below:
  regsvr32.exe atl.dll
  regsvr32.exe urlmon.dll
  regsvr32.exe mshtml.dll
  regsvr32.exe shdocvw.dll
  regsvr32.exe browseui.dll
  regsvr32.exe jscript.dll
  regsvr32.exe vbscript.dll
  regsvr32.exe scrrun.dll
  regsvr32.exe msxml.dll
  regsvr32.exe msxml3.dll
  regsvr32.exe msxml6.dll
  regsvr32.exe actxprxy.dll
  regsvr32.exe softpub.dll
  regsvr32.exe wintrust.dll
  regsvr32.exe dssenh.dll
  regsvr32.exe rsaenh.dll
  regsvr32.exe gpkcsp.dll
  regsvr32.exe sccbase.dll
  regsvr32.exe slbcsp.dll
  regsvr32.exe cryptdlg.dll
  regsvr32.exe oleaut32.dll
  regsvr32.exe ole32.dll
  regsvr32.exe shell32.dll
  regsvr32.exe initpki.dll
  regsvr32.exe wuapi.dll
  regsvr32.exe wuaueng.dll
  regsvr32.exe wuaueng1.dll
  regsvr32.exe wucltui.dll
  regsvr32.exe wups.dll
  regsvr32.exe wups2.dll
  regsvr32.exe wuweb.dll
  regsvr32.exe qmgr.dll
  regsvr32.exe qmgrprxy.dll
  regsvr32.exe wucltux.dll
  regsvr32.exe muweb.dll
  regsvr32.exe wuwebv.dll
• To reset Winsock, type netsh winsock reset and netsh winhttp reset proxy commands. Press Enter after each of them as usually.
• Finally, restart BITS, Windows Update, Cryptographic, MSI Installer services by entering the following commands each followed by Enter:
  net start bits
  net start wuauserv
  net start appidsvc
  net start cryptsvc

Install all Windows Cumulative Updates

If these methods did not help, we would recommend installing all missing Windows 10 Cumulative Updates. If you cannot do that using automatic Windows Update feature (Windows + I -> Update & Security -> Check for Updates), navigate to the official Microsoft’s update catalog and install the latest cumulative update manually.

Reinstall Microsoft Office

If all other updates, except Office, can be installed successfully, the culprit of the 0x80070663 error is most probably the Office update file corruption. Microsoft Office is updated are installed via automated Windows Update service once released.

If the system keeps failing to update Ms Office due to 0x80070663, we would strongly recommend you to reinstall the pack and then install it anew.

• If you are using Windows 10, press Windows key + I to open Settings.
• Open Apps -> Programs & Features tab.
• Find Microsoft Office entry, click it, and select Uninstall.

  

• If you are using older Windows version, go to Control Panel -> Add or Remove Programs.
• Select Microsoft Office pack and click Uninstall.
• After that, it’s advisable to run a scan with an optimization tool to eliminate all file leftovers. We recommend using [d1]. Any remaining files may trigger the installation of new Ms Office version or some of its update files may get corrupted again.
• Once done, reboot your PC and download the full Microsoft Office package from the official Microsoft’s website or another reliable source.