SystemRescueCd is a Linux system on a bootable CD-ROM for repairing your system and recovering your data after a crash
you are correct in that it is a Linux System to help recover from a crash, and also to check system hardware; such as a hard drive.
I also believe that Hamluis is on the right track with checking to see if the Hard drive shows up in the BIOS. The BIOS is actually responsible
for assigning resources and communicating with the hard drive. So it would make sense then to check the BIOS which is the most obvious
place to start.
You may in fact have had a Boot Sector Virus, which is rare today, although it still occurs. The point here is that a boot sector virus could
delete the boot sector and firmware on the hard drive, which would lead to the issue of the BIOS and Windows, or other operating system
not being able to see the Hard Drive.
The tools available in System Rescue CD such as NTFS-3g (Meant to read a NTFS formatted Hard drive) and Test Disk (Meant for searching
for lost partitions) are the tools that I believe may be helpful to you. The reference of these can be found below;http://www.sysresccd.org/System-tools
Also, if we find that one of the solutions above, such as checking to BIOS, and trying to read the File System in linux, or Test the mechanics
and Partition Table of the drive with something like DiscWizard or SeaTools shows that the drive is healthy; then we can help you move forward
and determine if the drive is in a usable state. We have to determine if the drive is damaged at this point before we can tell you to format the
drive that may have had a boot sector virus, because Windows is not seeing the drive.
Finally, it's also possible that you're Motherboard HAS Failed or IS failing.(specifically the piece that communicates with the hard drive)
The best advice we can provide is to start where the drive is Seen/Not Seen by the software on the system and by other operating systems,
or Diagnostic Utilities. You could use something like Norton Antivirus to boot your PC and check the disk for errors, but what you're telling us
doesn't make sense until the hard drive shows up somewhere.
If you have any questions, we'll be glad to help.
Usasma and Hamluis are exactly right in their approach to this issue. I tend to provide a slew of options that build upon one another when I can.
Sometimes I provide so much from the get go that it doesn't make sense. I'm hoping that I explain things in a manner that sparks questions
and Ideas about how to continue.