Trouble analysis of 8024402f error code when installing updates in Windows 7:
1. The Internet network connection is busy and the Windows Update server has too many update requests;
2. The computer is running a program that blocks the Windows Update service from accessing the Internet. Programs that may do this include firewalls, anti-spyware software, web accelerators, Internet security or antivirus programs, or proxy servers;
3. The system service Cryptographic Services or related Windows system files are damaged or missing.
Troubleshooting for 8024402f error code when installing Windows 7 updates:
1. Please check whether the Internet network connection is smooth, close Windows Update, then restart the computer, and try to connect to Windows Update again later; if the problem still exists, try to avoid peak Internet hours, choose a period when the network connection is relatively less busy, and try again. Try connecting to Windows Update.
2. Please turn off all third-party firewalls, anti-spyware software, web accelerators, Internet security or anti-virus programs with background monitoring functions before executing Windows Update; if a proxy server is used, please cancel the proxy server.
3. Please expand "All Programs" - "Accessories" - "System Tools" in the start menu, right-click "Command Prompt", select "Run as administrator" in the pop-up right-click menu, and then Execute in the command prompt: SFC /SCANNOW, pay attention to the space after SFC (Figure 1).
Figure 1