IT seems like you do not have PDO installed in you PHP. what version of PHP you are running? it must be php5.
as a quick workaround you can edit setup.php file like below, comment out PDO cehck and set it to false.:
——————–
/*
echo ‘pdo echeck;’;
if (class_exists(‘PDO’))
{
foreach(@PDO::getAvailableDrivers() as $driver)
{
if($driver==’mysql’)
{
$use_pdo = true;
}
}
}
echo $use_pdo?’use_pdo’:’no_pdo’;
echo ‘pdo end;’;*/
$use_pdo = false; // you don’t have PDO according to your error
——————
This will work only if you have PHP5 with no PDO. PDO is enabled by default in php 5.1 as far as I know.