After Step 4: Database setup- "An AJAX HTTP error occurred. HTTP Result Code: 500"

I'm having trouble with my drupal installation. After I successfully set up the database in the installation process the following message pops up:

An AJAX HTTP error occurred. HTTP Result Code: 500 Debugging information follows. Path: http://www.kittenswritingchallenge.com/install.php?profile=standard&loca... StatusText: Service unavailable (with message) ResponseText: PDOException: SQLSTATE[42000]: Syntax error or access violation: 1064 You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ') ORDER BY fit DESC LIMIT 0, 1' at line 1: SELECT * FROM {menu_router} WHERE path IN () ORDER BY fit DESC LIMIT 0, 1; Array ( ) in menu_get_item() (line 422 of /home/kittensw/public_html/includes/menu.inc).

It tells me to "continue to the error page" but when i click on the link, it brings me to the final step of "configure site" I mistakenly continued the first time, and nothing works- i can't log onto the site, and i didn't receive a welcome page at the end (like i now know i should have- I just recieved a blank white page). Now i deleted the database, created a new one, and restarted the install. I still receive that same error, and I have the feeling i should fix it before trying to go forward this time!

I'm currently installing drupal 7, i know i have apache, and I'm working on a Windows 7 machine. Keep in mind i know NOTHING, or very close to it, so newbie friendly instructions would be wonderful!

Thanks!

SM