Download Partition Wizard Bootable CD Free version from
Free download Magic Partition Manager Software, partition magic alternative, free partition magic, partition magic Windows 7 and server partition software - Partition Wizard Online
Note: If your PC which you want to recover was using 32bit Windows download the 32 bit version.
If your PC you want to recover was using 64 bit Windows download the 64 bit version.
Using Rufus
https://rufus.akeo.ie/ create a bootable pendrive with that ISO. ( Use an empty pendrive without any data on it.)( You will do this on a working PC)
Once you have created a bootable Partition Wizard pen drive, boot your non-bootable PC with it using the onetime boot menu. ( Make sure that you do not have any other external drive plugged in except your bootable PW pen drive.)
Once in Partition Wizard, select your drive and on the left pane click on Rebuild MBR. (If necessary click on APPLY on top Menu Bar, to complete the process)
Once the Rebuild MBR is done, click on the Partition Recovery Wizard on the left pane and run a quick scan.
All the partitions found will be shown in a window.
Post a snapshot of it. ( You have to take a camera shot)
Then Click on cancel and close PW. You can rerun Partition Wizard again after getting instructions from me as to which of the shown partitions you should select. Don't do this without my instructions. Selecting the wrong partitions will make your HDD worse and unrecoverable. So don't be in a hurry and wait for my instructions.)
At any stage, you need help ask for it. Since it is already bedtime for me, I shall be back only after another twelve hours.