Here are some steps you can take to fix QuickBooks error code 15107:

Restart your computer. This may seem like a simple solution, but it can often fix software problems.

Reboot your router and modem. This can also help to clear up any network problems that may be causing the error.

Update your antivirus software. An outdated antivirus software can sometimes interfere with QuickBooks updates.

Disable your antivirus software temporarily. If you are still getting the error after restarting your computer and router, you can try disabling your antivirus software temporarily.

Greetings,
Peter