Have you changed anything in the xampp/apache/conf/httpd.conf file or any of the files in the xampp/apache/conf/extra directory?
I might be quicker if either you paste the httpd.conf file here or issue this command using the command console in the xampp/apache/bin
Clcik on Start
Click on Run...
Type CD H:\xampp\xampp\apache\bin (if that is the path - change it to your actual path if needed)
You should now be in the bin directory
Type apache -t
Paste the results here.
Can you access the XAMPP Welcome Page in your browser?