I can't access the dashboard / wp-admin

Hello,

I have just upgraded from 3.1 (I presume) to 3.2 of WordPress. I started the update automatically for my wordpress blog but after 2 hours it was still installing the update so I reloaded the page. The website had a few errors and wouldn’t let me back into the admin panel.

I reuploaded the wp-includes files and I was allowed back on the website with the new update. But now when I try and visit the wp-admin dashboard I get this error:

Fatal error: Cannot redeclare get_temp_dir() (previously declared in /home/a6375040/public_html/wp-includes/functions.php:2160) in /home/a6375040/public_html/wp-admin/includes/file.php on line 175

Does anyone have any sort of advice to give?

Thanks