Hi MarkMcGuckin,
I am an independent advisor and a Microsoft user like you, and I would be happy to help you out with this.
One way to do this is to open the PDF file (for example, in Microsoft Edge, or Adobe Reader).
Then, you can go to File > Print, then select the "Microsoft Print to PDF" printer.
Choose the pages you would like to split from the original PDF, enter this in the Page Range you would like to print, and then press Print. You can then choose the location on where to save the new PDF with just the selected pages.
I hope this has helped you. If this is not what you are looking for, please reply and let us know and we would be happy to look into providing some different suggestions!
Regards,
-Ashton