Hi, I used Apple's in-home service repair program and the technician that was sent to my home, replaced the harddrive, logic board and power supply. I've noticed since having the computer repaired today,that I am having software-related issues such as not being able to sign in to my e-mail accounts as well as not being able to send the Apple registration form because of internet connections (my internet is working fine). I looked at system profiler and noticed that Apple replaced my 1 Tb. Western digital hard drive with a Seagate harddrive (ST31000528AS media). I not sure if the Seagate harddrive is causing the software issues but isn't Apple suppose to replace the same harddrive as I had before? Thanks in advance for your feedback to my question!