Hi Richard. OK, do you have the specifications of your new computer that you could post? Or perhaps a link to a website that shows the PC you purchased? If you need specific guidance on how to install MSFS 2020 on your new PC, the community here can help you if you are unsure what to do next. As an example, read this forum post:
I’m referencing it to show you how someone got lots of help from the community. Now, your situation is very different, but we can still provide advice on how to install MSFS on your PC. Feel free to keep asking questions, & we will do our best to answer 
