WP-ADMIN NOT WORKING

If it helps, here’s mine, however I don’t think that should necessarily be preventing your wp-admin section from showing. I think you may need to try and download the same version of WordPress as you have, and try replacing the files, as you may have deleted more than just the .htaccess file.

.htaccess:

# BEGIN WordPress
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>

# END WordPress

I can’t explain why, but in the past, I’ve seen times when an htaccess file change took a long time to be taken in by the server, maybe it’s your case.

Otherwise…

The usual suspects in such a case would be a faulty plugin/theme or corrupted blog core files (possibly also with wrong file permissions).

– Assuming you’ve made a backup of (root)/wp-content/ , you can try and rename by FTP (no need to delete, renaming deactivates them already, for instance add an underscore) the folders of your non-default plugins and themes. See if it helped.

– For the core files… Just in case, some useful info : REINSTALLING WORDPRESS IS SAFE ! (Assuming you make backups 😉 )
http://codex.wordpress.org/Installing_WordPress
When there’s already a wordpress installed, you can just delete the wordpress files in the root (and only the wordpress files, cf the contents of wordpress.zip as you downloaded it, and don’t delete your wp-config.php), and next delete (root)/wp-admin and (root)/wp-includes, and finally reupload by FTP the contents of your wordpress.zip archive (not the “wordpress” internal folder, the contents of that folder).

My advice may be scary, if you’re not used to what I’m suggesting, don’t go berserk and risk panic while trying with fear, you’d best wait for other advice, then 🙂

Giving your password to someone you don’t know would sound like the worst possible idea of the day. You’d better wait one more day to see if there are other replies to help you…

sabinou1 is correct, probably not a good idea to give someone you don’t know access to your website. Would you give a complete stranger a lend of the keys to your car/house?

What did you do to your install prior to it not working properly?

You said you deleted your .htaccess file? any others? have you tried re-installing wordpress?

Have you checked the error logs on the server, as they may indicate further what the errors are, it might be that more files are missing.

You may need to contact a web developer who will quote you for fixing this if this is a really important website.

You should only try to install the exact same version as already installed. Do not put a version of WordPress that is less/greater than the WordPress Database you have, as generally there have been changes between the versions. The longer you tinker like this you could end up making the problem a whole lot worse.

Any luck with those logs? As 404/500 errors won’t lead us to the root of the problem.

To be honest, it’s very hard to help you fix the problems when don’t know what state the website is in, apart from telling us it’s not working.

Frankly, me, I’m at a loss.

Maybe trying to add this in the beginning of your htaccess file,
SetEnv PHP_VER 5
(I doubt it will help)

Else, since it all started with an auto-installation by your host, contact them too, they might have particular rules working only with them ?