This is not what a support forum is for.
If you provide a link to your website, we may be able to help you figure out what is wrong or what is happening on your end. There are many possible reasons to get an error like this.
You can determine which version of WP you are using from the dashboard.
Hi sorry.
WP version = 3.4.2
Actual website link:
A user tried to go to http://www.cheapghd.com.au/www.cheapghd.com.au/http:/www.cheapghd.com.au/wp-comments-post.php and received a 404 (page not found) error. It wasn’t their fault, so try fixing it. They came from http://www.cheapghd.com.au/www.cheapghd.com.au/http:/www.cheapghd.com.au/wp-comments-post.php
I get several errors similar to this. I have tried posting comments etc to replicate the fault but I cannot. Because the wp-comments-post.php is not an actual page.
It happens at least once a day. So I do not think it is related to the search bots.
Thank you so much for your help 🙂