Sony VAIO Z1WA start up and disc problem?

VAIO Z1WA
This message appears when I turn on :


Warning Immediately back up your data and replace your haed disc drive A failure is imminent
Press F1 to Continue

When I press F1 the prompt to start in Safe Mode etc starts, which ever option I choose it takes me back to the warning message above after a minute or so of attempted booting

Sony have suggested replacing the drive, would you agree
They have said I could install the drive on a desk top and this should allow me to recover my data

If you agree with this how do I remove the drive, I have tried to open the computer up and after removing all the screws can only lever the front section open a little and it is being held together around the keyboard area and by the lid pillars

Hope you can help

Thanks