foswiki.conf
from that page and put it in C:\Program Files\Apache Software Foundation\Apache2.2\conf\foswiki.conf
.
C:\Program Files\Apache Software Foundation\Apache2.2\conf\httpd.conf
and add the line Include conf/foswiki.conf
at the very end.
C:\Program Files\Apache Software Foundation\Apache2.2\logs\
or change to the directory C:\Program Files\Apache Software Foundation\Apache2.2\bin\
and run httpd.exe
to get any major syntax errors reported.