Hi Terrel,
Technically, Office 2007 is supported to run on Windows 10. Make sure you have all available updates installed (at least Service Pack 3) for Office 2007, and then check whether this issue continues.
>>Do I need to upgrade to Outlook 10? If so is that a free download?
You have to buy Office/Outlook 2010 if you want to upgrade to it.
By the way, Office 2007 has reach the end of support. To get a better user experience and support, it's highly recommended to upgrade to a newer version.
Regards,
Steve Fan
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