Cross Sell - Displays error but not installed

We installed Zen-Cart and set up our categories/products as usual. When we displayed the products however, we get the following msg.

Warning: main(includes/templates/template_default/templates/tpl_modules_xsell_products.php): failed to open stream: No such file or directory

This msg repeats 4 times as the code fails on varous lines.

Although we have used cross sell on other carts we never installed it on this one. The cross sell module does not show up in the Admin panel.

Any ideas ?

Thanks

Might you have used site files from another install ??

This is not part of any distribution that Zen Cart provides and If this was a clean install they would not be there...

Or maybe A DB upload that had it installed??