Warning: Cannot modify header information – headers already sent by …………

Hey,

I am kind of noob in installation so will be grateful if guided step by step.

1. I made a database and a user and gave it rights.
2. Then i remaned sample config to config.php
3. i entered database name, username, hostname as localhost, charset to utf8
4. copy all files and folder to Public_html folder.
Then i run Install PHP. Word press form appeared where i gave sitename info and other info.
It took me the page which has the username and password appeared. But the page uploaded with a WARNING:

Its says this:
“Warning: Cannot modify header information – headers already sent by (output started at /home/wordscan/public_html/wp-config.php:1) in /home/wordscan/public_html/wp-admin/install.php on line 54”

Now if i press login from that page then it gives me error that “Internal Server Error
The server encountered an internal error or misconfiguration and was unable to complete your request.
Please contact the server administrator, [email protected] 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.
Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.”

Now in install.php file on line 54 its written:
“header( ‘Content-Type: text/html; charset=utf-8’ );”

Now please guide me about the issue.

Waiting for your reply

Thanks,