good point, did wonder if this was durring instal, did you download the straight apache instal or go for a distribution like swamp?
and do you have a directory and file called c:\conf\httpd.conf?
I really could be wrong, but I think the error may be coming when the instal tries to start the apache2 service, have a look under services and see if the service is registered and waiting to be started...
<-- all this is just pointers am afraid, as I have as much of an idea about installing this as you do, ive only ever done it twice.. and needed 6 valium afterwards to regain composure... <--- so dont be surprised if someone comes along and gives you correct advice