As @Sergii says, the internal search requires you to install EPiServer Search.
If you downloaded EPiServer 7 and ran setup.exe, you should be given the choice to install the EPiServer Search service.
(Otherwise you can run EPiServerSearch.msi from the EPiServer 7 zip file manually)
You should also be given this option via Deployment Center. Have a look at this blog post for details:
http://sveinaandahl.blogspot.no/2013/06/how-to-install-episerver-search-for.html
Once installed, log back into your site and go to Admin > Config > Search configuration.
Make sure Blocks, Files and Pages are checked.
Hi,
We use Episerver 7 and it seems like the Search field dont work.
I get "no results" when I search pages, block, files whatever.
Anyone have an idéa why?
/T