Can’t access wp-admin and deactivated plugins

I can’t access wp-admin after our site was hacked. GoDaddy cleaned up the site after it was hacked and now the site works but I can’t access wp-admin. I tried changing the passwords, deactivating the plugins and nothing has worked. The site also will only work with the url I specifically enter into the cPanel, it won’t work without the “www” or vice versu. I’ve tried it both ways and it will only work with what I enter in exactly. I don’t want to have to delete all of the WordPress files if I don’t need to. I can only do the simple fixes on WordPress and don’t know coding. This is the error I get:
Warning: Cannot modify header information – headers already sent by (output started at /home/ccprogram/public_html/wp-includes/default-widgets.php:1) in /home/ccprogram/public_html/wp-includes/pluggable.php on line 1192

Thanks!

• This topic was modified 9 years, 6 months ago by collaborativecommunityprogram.