Hi jscotteverett,
I understand that you are having issues with iCloud for Windows installing. Let's see what is going on.
Now you say a default program, but I wonder if it is related to a dealt account. This is stating that iCloud can't be the default account in Outlook. If it is, take a look at the information below to get you sorted out.
Get help using Outlook with iCloud for Windows
https://support.apple.com/en-us/HT204571
When iCloud is set as your default account in Data Files, your data won't sync between your devices.
Outlook 2010 and later:
- Select File > Info > Account Settings > Data Files.
- If iCloud is listed as the default account in the Comments column, select a different account.
- Click Set as Default.
Outlook 2007:
- Select File > Data File Management > Data Files.
- If iCloud is listed as the default account in the Comments column, select a different account.
- Click Set as Default.
Let me know if this helps.
Have a good day