so i have a dell studio 1558. to say its been problematic is a understatement. its just over a yr old. as of late twice now over the past few months. i will be on the laptop. all of the sudden it just shuts down like i hit shutdown button. then will try to reboot and fails. will run startup repair but never repairs. i always have to go into my windows 7 cd or a startup cd. do cmd promps and restore the bootsector. after this it boots fine. the time before the last time. i went as far as to restore my factory recovery image. redoing all my programs and anytime upgrade to windows 7 64 bit ultimate from there. this time i just fixed the boot sector. what is causing this? is my hd about to fail? do i need to do a full wipe removing dells factory image and just do a clean full install? its really starting to be annoying. i have 2 other machines running windows 7 ultimate 64 bit. none of the experience these issues.