How to Fix Windows 10 Upgrade Error Code 8024402C on Your PC

When upgrading to Microsoft Windows 10, some users may encounter Error Code 8024402C. This error, while attempting to update, is a result of five possible issues. The error code itself is not a critical concern, yet while the error is occurring, users will not be able to upgrade their Windows software. As with any Microsoft error code, even if it is not critical, it is recommended that the error be addressed sooner rather than later. An insignificant error now could lead to a larger, more catastrophic error later on.

Common symptoms include:

• Dialog box appears with the Error Code 8024402C when attempting to upgrade to Microsoft Windows 10.
• Your current version of Windows is unable to recognize the need for an update to Microsoft Windows 10.

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As previously stated, there are five major reasons why error code 8024402C occurs.

• An erroneous character in the proxy override settings
• A wrongly configured firewall that is preventing the update from taking place.
• Attempting to access the Windows 10 update through a VPN (Virtual Private Network) connection.
• Workstations that operate behind a corporate ISA server.
• A corporate network system that does not have autoproxy enabled.

The sooner these known causes are addressed, the sooner you will be able to successfully upgrade to Microsoft Windows 10.

Microsoft Support posits four different resolutions to these known error code 8024402C issues. Some of these methods will be more comfortable for at home users than others. If you are experiencing this issue in a corporate or business setting, it may be better to have your IT tech or department attempt the methods.

Method 1:  When your firewall is causing the issue.

1. Access your firewall software.
2. Specifically look into the settings associated with your firewall.
3. Make sure that the following three websites are listed as exceptions to your firewall or proxy.

• https://*.windowsupdate.microsoft.com
• http://download.windowsupdate.com
• http://*.windowsupdate.microsoft.com

4. If any of these websites are missing from your firewall list, add them to the list.
5. Restart your Microsoft Windows 10 update.

Method 2: For an erroneous character in the proxy override settings.

1. Open internet explorer, if you use another program to access the internet, you will still need to use internet explorer for this solution.
2. Open your internet explorer tools window.
3. Click on internet options.
4. Choose the connections tab.
5. Select LAN settings.
6. Choose the Advanced option.
7. Delete anything that appears in the exceptions section.
8. Close out of internet explorer.
9. Click on your start button.
10. Select RUN and type CMD into the field, press ENTER.
11. This will access the command prompt screen. Type “proxycfg -d” and press ENTER.
12. Type the command “net stop wuauserv” and press ENTER.
13. Finally, type “net start wuauserv” and press ENTER.
14. Now you have cleared your proxy cache. Access the Microsoft Windows 10 update again to download.

Method 3: If a VPN connection is causing error code 8024402C.

1. Disconnect from your VPN connection, thus connecting directly to the internet without a proxy or network.
2. Retry the Microsoft Windows 10 update.
3. After the update is successful, reconnect to the VPN network.

Method 4: Use this is an ISA server is in place at your networked business site.

1. Access the ISA firewall client option. From here your goal is to initiate the ISA server automatic detection feature.
2. From the control panel, select the firewall client option.
3. Choose the configure option.
4. Check the box next to “automatically detect firewall server”.
5. Select the “update now” button.
6. Click the OK button.
7. Restart your Microsoft Windows 10 update.

Again, not all of these methods are meant for computer users who do not usually explore and change software settings of this nature. If you do not feel comfortable with any of these methods, you can opt to download and install a powerful automated tool to repair Windows error code 8024402C.

For further information you may be interested in these similar issues:

How to Repair Windows 10 Upgrade Error Code 8024001F

How to Repair Windows 10 Upgrade Error Code 0x800F0922

How to Repair Windows 10 Upgrade Error Code 0xC1900200 – 0x20008(Code 0xC1900202 – 0x20008)