The log in that screen shot looks like it's running, despite what the status shows?
I would presume that xampp would only monitor the apache. Check your services for apache or httpd. Try starting it manually from there, if it doesn't stay on or throws an error then there is a problem, so post the error message (worker threads exiting isn't really an error, its an event). Check the httpd error logs as well; apache is typically quite anal on windows when it cannot find resources to load (but should issue an error eluding to such).
header('HTTP/1.1 420 Enhance Your Calm');