I had this problem before when i tried installing xampp on my new vista (why, oh why did i get vista..) Anyway, i did something which then allowed xampp to work. However, i uninstalled xampp (i forget why..) and upon reinstallation it doesn't work.
Everything installs fine; it even says so. I open the xampp control panel and attempt to start apache or mysql they will start, then after a second or so the 'Started' text disappears - if i highlight the text in that same area it reveals a hidden 'stopped'.
When i run apache_start i get the error:
"An attempt was made to access a socket in a way forbidden by its access permissions. : make_sock: unable to listen for connections on address 0.0.0.0:800
no listening sockets available, shutting down
Unable to open logs"
I've tried running the portcheck but it immediately comes up with "openports.exe has stopped working" - i also tried running it in administrator.
Thanks for any insight.