Problems with theme

Whenever I try to click on the screen the site goes into a shadow and becomes non responsive - I can still click on the wordpress menu at the top of the screen?

Please help!

Without seeing your website it is hard to tell what’s wrong but I assume that it is some kind of WordPRess lightbox plugin enabled that you are no longer using and it causes this lightbox effect without doing anything usable.
This is definitely not part of theme itself.

Yes spot on, was a lightbox plugin.

Works great now, thanks!