only apple software works

Since I reinstalled my software from my timemachine, my macbook pro 13" 2011 i7 4GB is acting weird.

Only apple's software makes a connection to the internet.

Other software products like chrome, spotify and dropbox tell me there is some sort of proxy problem.

When opening spotify it says:

there is problem, your firewall blockes spotify, or you are using a proxy.

But I've resetted the proxy settings to the original state, which is none of the choices selected in system preferences, and turning off my firewall doesn't help.

What should I do?