App Store not working in Mountain Lion?

I've only this error so far:

http://img832.imageshack.us/img832/1153/schermata082456152alle2.png

It's in italian, it means: An unknown error has occurred.
Same error in iCloud too. How can I fix this error?

Have the same problem ! Have you found a fix for this ?

I had the same problem. I found an answer on another website. It worked on two separate ML installations.

Open the System Preferences app and go to the Network section. On the left-hand column in the Network section, select each of the items and remove it by clicking the minus sign on the bottom of the column.
Then, go to /Library/Preferences/SystemConfiguration in your main hard drive and delete NetworkInterfaces.plist. Or alternatively, drag it to the desktop (as a backup, in case things go wrong).
By removing all of the Network items in System Preferences and deleting NetworkInterfaces.plist, you have effectively reset the network configuration for Mac OS X. Reboot (you may have to reconfigure your internet connection afterwards *****).

***** I found that I had to add a service and then make it inactive and active again for it to start working.

Here's a thread on this forum about the problem. The final post by kofmasters suggests the same solution.
http://www.tonymacx86.com/mountain-...verified-app-store-error-mountain-lion-3.html

Thanks a lot ! This trick worked

shlokpatel said:

Thanks a lot ! This trick worked

Click to expand...

Glad you got it working.