Support for the IDE ended in April of 2008. OS support ended with Windows 8.1. If you want to use it in a supported environment, you can keep a copy of Windows 8.1 around. I have both my laptop and Workstations dual booted to Windows 10 and 8.1 specifically for that purpose.
However, the IDE appears to run on Windows 10. I have had no issues with the IDE on Windows 10 thru version 2004. I only use the 8.1 installed IDE to generate final binaries (EXEs or DLLs) for clients.
Installing and running it on Windows 10 does require some special handling. There are links explaining this in detail so I will not try to do one more. I do find that many do not cover all the issues.