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Process: 1. Open cmd 2. Type the following command c:\attrib -h -r -s /s /d g:\*.* Note: "g" may be any drive letter of HardDisk or your removable drives.

Just few simple Process: 1- Close iTunes if it is already open 2- Open Internet Explorer 3- Click Tools, then Internet Options 4- Click the "Advanced" tab 5- Scroll down to the security section. Make sure "Check for server certificate revocation (requires restart)" is UNCHECKED 6- Then click Apply AND/OR OK 7- Restart the computer BUT PLEASE FIRST BOOKMARK (add to favorites) THIS PAGE SO YOU CAN COME BACK WITH ME AFTER THE RESTART, and click Accept if the issue is solved (that's the only way I can get paid for my effort. Thank you) 8- Open iTunes. Please let me know if the issue is solved or not, so we can continue troubleshooting. Source:  http://www.justanswer.com/mac-computers/424u2-need-help-getting-itunes-work-lapt op-it-s-running.html