What to do if you cannot access your PC's Hard Drive?
If Windows fails to load and you cannot even access your hard drive, try booting from a DOS-bootable USB drive, that you should have already created, to establish whether or not the drive is actually working properly.
If this works, you should be able to view the contents of your hard drive and even reinstall your Windows Operating system if necessary.
If your PC will still not boot, then the problem can only be one of three things:
1. The Hard Drive itself is faulty and needs changing (try changing to a fast SSD https://www.qbs-pchelp.co.uk/pchelparticles/ssdinstall.html).
2. The Hard Drive's cable is damaged or wrongly connected.
3. The PC's BIOS is incorrectly configured (by far the least likely problem).
You will need to check these three things yourself. Alternatively, engage the services of a PC repair technician to undertake the work for you.