Windows 7 Home Premium Service Pack 1
-> cannot conect to localhost:80
httpd.exe: Could not reliably determine the server's fully qualified domain name, using 192.168.0.2 for ServerName
[Sun Feb 09 16:07:55 2014] [emerg] create_mem_node C:/Apache_Mod_Cluster/httpd-2.2/logs/manager.node failed: Zugriff verweigert
(Zugriff verweigert translates to Access Denied)
Dear Hans-Michael, try to disable UAC (User Access Control). If it helps, then you might want to fiddle with MemManagerFile directive in conf.d/mod_cluster.conf and eventually get it running even with UAC enabled (not sure about that though). Give it a try and let us know....