Data recovery after OS failure with a different computer
If the hard drive doesn't sound somewhat weirdly and that the machine does detect the disk and doesn't report on any problems with, the hard drive is luckily intact. Even if the operating system doesn’t boot, in this case it doesn't mean that the data is lost forever. Using proper software and following simple recommendations you have great chances to recover lost files.
If it's technically possible, you should carefully remove the drive from your computer and connect it to another computer as described in How to: Connect IDE/SATA drive to a recovery PC article. After connecting the drives, it's strongly recommended to create an image of the drive using disk imaging software. Disk imaging is only a precaution that will allow recovery software to work in a safer virtual environment. And yet, recovery procedure can be accomplished from the hard drive itself with the help of UFS Explorer. This software combines a set of all tools for recovery from a failed operating system. The utilities are developed in a user-friendly way to make the recovery procedure simple. If the scanning gives good results (the system is intact), you can copy the data from your hard drive to an external storage. Damaged data can also be just copied from the operating system to an external storage for further reference.