iTunes Errors

Recently, I got a new laptop and so I have the latest version of Windows 8. After installing iTunes and plugging in my iPhone it says, "The iPhone cannot be synced. An unknown error occurred (-54)" I've tried uninstalling and then re-installing iTunes onto my computer, but it is not working. I have no clue how to fix it even after trying to change the security settings for it. i even try running it as administrator but still no difference. If I restore my iPhone will it fix the problem? I really don't want to restore my phone but will if I have to. It works perfectly fine for my 4th generation iPod touch, but not for my iPhone 6.

Any suggestions?