Have a Sony Vaio VPCEB1S0E/WI... Only alterations are: Main drive has been replaced with an SSD and a second drive caddy was added housing a 500GB standard SATA drive. The issue: Laptop has started randomly freezing, sometimes it'll freeze and the Windows 7 default loading ring will still spin. Ultimately the machine is rendered useless until a hard reboot. One time after a hard reboot the VGA was reset to 1024x768 pixels, even at the login screen. The fan and vents are clean so it's not an overheating issue, also temperatures seem good. S.M.A.R.T reports the main SSD (Samsung 830 64GB) health at 97%. If I'm playing a song via media player, Ableton Live or Youtube, when it crashes it will buzz like mad. Also crash times are completely random. Any clues? I can dissasemble. EDIT: Memory tests come back clean on both Windows and Linux.