How to Resolve Error Code 0x80070490: Windows Unable to Install Necessary Files in Windows 8.1

Here are various methods to resolve error code 0x80070490 in Windows 8.1:

1. Run the Windows Update Troubleshooter: Navigate to Control Panel > Troubleshooting > System and Security > Windows Update > Run the troubleshooter.
2. Reset Windows Update components: Open Command Prompt with administrative privileges and input the following commands one by one:

 net stop wuauserv
 net stop cryptSvc
 net stop bits
 net stop msiserver
 ren C:\Windows\SoftwareDistribution SoftwareDistribution.old
 ren C:\Windows\System32\catroot2 catroot2.old
 net start wuauserv
 net start cryptSvc
 net start bits
 net start msiserver
 

3. Check for corrupted system files: Open Command Prompt as an administrator and input this command:

 sfc /scannow 

4. Disable antivirus software: Sometimes, antivirus programs can hinder the installation process. Temporarily disable your antivirus software and attempt to install the updates again.
5. Perform a clean boot: A clean boot helps identify and resolve software conflicts causing the error. Follow these steps for a clean boot:

a. Press Windows key + R to open the Run dialog box.
b. Type msconfig and press Enter.
c. In the System Configuration window, click the Services tab.
d. Check the box next to Hide all Microsoft services.
e. Click Disable all.
f. Click the Startup tab.
g. Click Open Task Manager.
h. Disable all startup items.
i. Close Task Manager and click OK in the System Configuration window.
j. Restart your computer and try installing the updates again.


If none of these methods work, you may need to perform a system restore or reinstall Windows.