Hoping someone can give me some options, or things to check on this. I've been trying to install some of the default extensions that come with DNN 5.0. Such as the repository, installing the new version of forms and List module, as well as the forum module.  However when I try to install these it runs extremely slow loading them, in the instance of the repository it only loads the repository dashboard. When I add the dashboard to the page it throws up an error. Also I'm getting time outs.

The server is rather beefy and is hardly using any processes, and the connection to the server is good as well.... just not sure what could be causing it to time out, any ideas? 

Thanks for the response Sebastian,

Just off the top of my head it seems like every page call, and I have the standard components installed, and only installed/uninstalled the modules that I've tried to get working, such as the repository module etc.

However, I would check on these things and update you.