Ok, I was reading through your posts and found NOTHING useful! only some information about mod_rewrite and .htaccess. Ive already tried deleting the component on the server and still nothing.

AS SOON AS I INSTALLED THIS COMPONENT THE FOLLOWING HAPPENED:

Internal Server Error
The server encountered an internal error or misconfiguration and was unable to complete your request.

Please contact the server administrator, Tato emailová adresa je chráněna před spamboty, abyste ji viděli, povolte JavaScript and inform them of the time the error occurred, and anything you might have done that may have caused the error.

More information about this error may be available in the server error log.

I do not use .htaccess, and do not mess with mod_rewrite, so any suggestions on how to fix this and rid my site of this component would be great. Expecially considering my site is now DOWN!

I cannot access my frontend or backend, so any help you could give fixing this on the server side would be great!

same erro with me

internal server error after install component

in ftp

enter in your files and rename the file .htacess

after that your webpage works fine

try do that

Probably usage of .htaccess is not allowed at your server at all.
JoomSEF creates .htaccess file on install, so if usage of .htaccess is not allowed, it may cause the problem.

The solution is to connect using FTP and delete the .htaccess file.