Let me explain what is error 12007 and why it occurs, Purchase Altius. 

QuickBooks Error 12007 occurs at the time when a user tries to update the QuickBooks desktop or try to make any changes to the QB payroll service function. The other possible reason behind this error is the inability of accessing the internet connection through your desktop.

To isolate the issue, you need to do the following: 

1. Test connectivity and settings.
2. Review the Internet Explorer settings
3. Check security settings

For the detailed steps, you can check out through this US article (same solution work for UK version) for additional troubleshooting guides: Get help with errors 12002, 12007, 12009, 12029, and 12031 when updating.

I'm also adding these articles as your future references in fixing other installation and update errors in the future:

• Fix QuickBooks Desktop Update Errors
• Fix QuickBooks Desktop install errors
• Unrecoverable error in QuickBooks Desktop

Let me know if you have any other questions. I'm more than happy to help. Have a good one!