Cannot login into iMessage or Appstore but can in iTunes

[shlokpatel]

Hi, I just clean installed mountain lion on my new build and everything seems to work fine except that I cannot login into app store and download any apps and also cannot login into iMessage but when I try log in into iTunes it works fine. The error message on Appstore is "An unknown error has occurred". I dont mind iMessage but I dont know how to fix the error on Appstore.

Things I've tried -
Restarting
Removing NetworkInterfaces.plist

My Computer -
Motherboard - z77 pro4-m
CPU - i5 3570k
Sapphire Radeon 6870 graphics
Seagate Barracuda 1tb (Which is where windows is installed on - dual boot using chimera)
Seagate Momentus 5400.3 ST980811AS 80GB hard drive for Mountain Lion
OCZ CoreXStream 500W Powersupply

Any help would be really appreciated !

 

[loginfailed]

Have a look at this post and see if any of that fixes it:

http://www.tonymacx86.com/mac-os-x-support/20702-sign-app-store-issues-after-10-6-8-lion.html
^^CLICK^^

 

[shlokpatel]

Thanks a lot ! The instructions on the website worked

 

[loginfailed]

Cool, glad I could help.