I see that a few people have had this problem so i've tried the fixes suggested but to no avial. So I'm really hoping that someone will be able to help.
This is what i've done so far:
FTP'd all contents of WP download into my root directory and then typed http://underwoodink.com/wp-admin/install.php
Then I I get file not found.
Then I tried moving all the files into a sub folder called wordpress and dis the same i.e. http://underwoodink.com/wordpress/wp-admin/install.php
I still get the same error.
I checked the WP requirements with mu host and they said they're fine.
Any ideas about what to do to fix this?