Post Install, but pre use

I have installed WordPress and the back end seems to be working but when I go to look at the front end of the website all I get is the following.

Warning: main(./wp-blog-header.php): failed to open stream: No such file or directory in C:\Inetpub\vhosts\argusventures.com\subdomains\wordpress\httpdocs\Index.php on line 4

Fatal error: main(): Failed opening required ‘./wp-blog-header.php’ (include_path=’.;./includes;./pear’) in C:\Inetpub\vhosts\argusventures.com\subdomains\wordpress\httpdocs\Index.php on line 4

You can also see it online at: https://wordpress.argusventures.com/

If you have ideas on what the problem is all solutions would be greatly appreciated.