I've been having an issue where my laptop freezes and I figured out that it only does that when there's a disk in the drive. It does not have to be reading it to freeze. If I take the disk out, the laptop works fine. I have a Dell XPS 15r with an i7 2nd gen processor. Windows 7 64bit. I thought it was a game that was causing the issue but I've reinstalled windows thinking that it was an OS problem because I did a system restore prior to the game installation. But alas, I know what causes it now but I don't know if it's hardware or software at this point.