When you indicate
I then installed the necessary software on the server.
do you mean you installed the prereqs for 8.8 (net 2.0, etc...)? If so then 8.7 does not like .Net 2.0 very much. If you are still running (8.7):
Open a command prompt.
Change to cd %systemroot%\Microsoft.NET\Framework\v1.1.4322
Run aspnet_regiis.exe -i
Thank you, I'll give this a shot. We do plan to try the upgrade again soon to 8.8. Will this affect the upgrade?
This should not affect your 8.8 upgrade.