Warning: include(TEMPLATEPATH/functions/bfa_get_options.php) [function.include]: failed to open stream: No such file or directory in E:\php\xampp\htdocs\atahualpa353\index.php on line 3

Warning: include() [function.include]: Failed opening 'TEMPLATEPATH/functions/bfa_get_options.php' for inclusion (include_path='.;E:\php\xampp\php\PEAR') in E:\php\xampp\htdocs\atahualpa353\index.php on line 3

Fatal error: Call to undefined function get_header() in E:\php\xampp\htdocs\atahualpa353\index.php on line 5

what happens?

It looks like your install failed. If this was an automatic install, I suggest you do it manually ( see the FAQ in the 'New Versions' forum)