Customer reports compiled versions of Apache 2.4 on apache.org differ in stack space, Linux is 8MB, but Windows is 256KB.
This is inadequate for the web agent, causing crashing during startup, so the following needs to be done using Visual Studio to increase;
editbin /STACK:524288 httpd.exe
Release : 12.52
Component : SITEMINDER -WEB AGENT FOR APACHE
3rd party software defect, avoid certain apache release 2.4.39, 64bit, which has smaller stack reserve space.