installing first time opencart on wamp

i am new in this platform. i download the opencart and move the upload file to the wamp www directorty. i created a new database named opencart. then in the phpmyadmin when i clicked upload i show this error, and i can't go on, it's noted that my config.php file is totally empty
Warning: require_once(D:\My site/s vault\wamp\www\upload/system/startup.php) [function.require-once]: failed to open stream: No such file or directory in D:\My site's vault\wamp\www\upload\install\index.php on line 19

Fatal error: require_once() [function.require]: Failed opening required 'D:\My site/s vault\wamp\www\upload/system/startup.php' (include_path='.;C:\php5\pear') in D:\My site's vault\wamp\www\upload\install\index.php on line 19

CAN ANYONE TELL ME HOW CAN I SOLVE THIS ISSUE?
I NEED TO INSTALL OPENCART ON LOCAL HOST