I ran into this issue doing the upgrade to Windows 10 ver:2004. I hope you have found an answer. Here is what worked for me:
I opened a File Explorer, right clicked This PC, clicked Properties.
In the System window, I chose Advanced System Settings in the left column.
In the System Properties, I clicked Environment Variables.
Under System Variables, I clicked Path. Above there were two options. I edited both.
When you click on edit, you will end up with a long string in a short box. I recommend copying the long string into Notepad to look at it unencumbered. You should see C:\Windows\system32:C:\Windows\Powershell;. You may find other programs listed. In my case, I had about 5 entries for Roxio. I deleted everything except the entries for system32 and Powershell in each of the two options. I confirmed my choices and rebooted the computer. I tried the install and it now worked. I hope this helps.
Cheers!