Resolving Error Code 0x80070490: Troubleshooting Windows 8.1 Installation Issues

Discover effective methods to address the error code 0x80070490 when installing Windows 8.1:

1. Utilize the Windows Update Troubleshooter: Navigate to Control Panel > Troubleshooting > System and Security > Windows Update and initiate the troubleshooter.
2. Refresh Windows Update components: Launch Command Prompt as an administrator and sequentially execute these commands:

 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. Verify system file integrity: Open Command Prompt as an administrator and enter:

 sfc /scannow 

4. Temporarily deactivate antivirus software: Antivirus programs can occasionally disrupt the update process. Deactivate your antivirus briefly and attempt the update once more.
5. Execute a clean boot: Performing a clean boot can assist in detecting and resolving conflicts that might be causing the error. Here’s how:

a. Press the Windows key + R to open the Run dialogue box.
b. Type msconfig and hit Enter.
c. In the System Configuration window, select the Services tab.
d. Activate the 'Hide all Microsoft services' option.
e. Select 'Disable all'.
f. Go to the Startup tab.
g. Open Task Manager.
h. Disable all startup items listed.
i. Close Task Manager and confirm by clicking OK in the System Configuration window.
j. Restart your computer and attempt the update installation again.


If these methods do not resolve the issue, a system restore or a reinstallation of Windows might be necessary.