If it is asp.net, I see three places in the optionalfeatures.exe window where that option appears. Once in .Net 4.8 and three times in the Application Development Features section of Internet Information Services.
To open that dialog type optionalfeatures.exe in a Run box. It would be easy to check and see if any of those boxes are checked. Since ASP .Net seems to be a web development utility, is that part of your configuration?
I have checked my two systems and no mention of aspnet_regiis.exe on either one in the Setupact.log
I wonder if some type of development software is turning these options on for this and iissetup.exe..?
Sorry I can't read .rar files but Sumit will probably track it down.