My Samsung R530 won't boot, just shows blue screen of death on startup, states "A problem has been detected and Windows has shut down to prevent damage blah blah blah Unmountable_boot_volume!!" Laptop came with Windows already installed and no recovery disks (!!) product key is on label on back of laptop. Anything I can do??

So many computer face this blue screen fetal errors on windows.

This error comes usually when there is problem in software or driver compatibility issue with hardware or operating system.
Also this error comes when there is bed indexing unit in hard drive.
You can solve this errors with following 2 methods.
(1)When you power up the computer press F8 key then enter in safe mode.
Then if you are able to enter in safe mode then uninstall driver or software which you installed recently and face this error.
(2)If you are not able to enter in safe mode Then you need to fix error on hard drive.For that you need windows disk or recovery disk.
Boot your computer with that disk
For that when you power up the computer press F1 or F2 "del" key to enter in bios.
Then go to boot menu and set first boot device as your cd or dvd rom.
Then save settings and exit bios.
Insert windows disk in cd /dvd rom.
Then it boot with that disk.Then you get this message "Press any key to boot from cd.."
Then press any key.
Then follow the procedure then enter in recovery console mode then type in prompt "chkdsk /r"
Then type "y"
Then it fix error on hard drive.
Then check if again you are not able to enter in windows then boot again and this time choose "R" option for repair previous windows " then it repairs old windows then it loads again old windows.
Thanks for using FixYa.

Get a new hard drive there like 80 bucks at Fry's

If you are interested in fixing it more easily and quickly. I think you can try this computer boot up suite called BootSuite. When your computer crashes, cannot enter Windows, or you want to work under boot environment, this is your best choice.

Hi,

You can face a number of issues with a blue screen error in Samsung R530. This might cause a serious memory dump in your laptop and you might be unable to use a lot of data after the blue screen error. It is also possible that you may lose a lot of settings of the laptop and you may not be able to recover these settings again.
Get more information to fix Blue Screen Error :

http://supportforsamsung.iyogi.com/r530/blue-screen-8.html

Hope this information helps you.