Assuming that you have not enabled the bit-locker encryption I would recommend you to perform following steps which may help resolving the issue.
When Automatic Repair fails and you cannot even get into Safe Mode, then most probably there are some errors or missing files on your hard disk that prevent Windows 8 from starting correctly. Bootable installation media (DVD or
USB) or Recovery Drive/System Repair Disc are helpful in such cases.
Some Windows 8 users report endless Automatic Repair failures and restart loops - you cannot disable Automatic Repair, but you can boot from installation media or Recovery Drive to fix errors and make Windows usable again. You can
also enter BIOS/UEFI and set your disk controller mode (aka SATA mode, RAID mode) to
Standard (aka Standard IDE or SATA, Legacy) instead of AHCI or RAID. This will ensure that Windows will know which drivers to use for booting from the system drive.
In case you have multiple hard drives, you can power off (also remove power cord!) your computer and disconnect drive cables from all hard disks other than the one where Windows is installed. Plug the power cord back in and see if this helps Windows 8 to boot
properly.
If you formatted or converted your system drive from MBR partitioning to GPT, you must ensure the EFI boot options state "UEFI only". In old BIOS mode, Windows 8 will not detect your GPT hard drives or partitions correctly. No booting,
no Refresh Your PC or Reset Your PC until "UEFI only" is set. Credits go to Sol for confirming this issue. Windows 8 requires UEFI for GPT drives. This is a must and there is no workaround.
You can easily verify whether UEFI works correctly by opening Troubleshoot and
Advanced Options in Windows 8 Advanced Startup screen. If "UEFI only" is set, you'll see the
UEFI Firmware Settings option listed.
Somewhat similar cases are with the "The drive where Windows is installed is locked. Unlock the drive and try again" errors while refreshing/repairing Windows 8 installation. In some cases, Windows 8 forgets the proper drive/partition
order and tries to load files from a wrong one. Again, power off your computer and remove power cord. Then disconnect cables from all hard drives except the one where Windows 8 resides, connect power cord and see if boot process completes properly now.
Or, if Windows still works somewhat, try upgrading storage drivers and software using
Intel's Driver Update Utility (Internet Explorer installs ActiveX control, other browsers require Java) or find the driver software from
AMD's site. This often solves all problems.
Please do this before using tools provided in Recovery Environment - there is no point in repairing Windows if defective memory will ruin it again soon.
To access Repair your computer/Recovery Environment (aka Limited Diagnostic State), you must have either Windows 8 DVD or Windows 8 Recovery Drive (USB) or System Repair Disc (CD/DVD) available in case Windows is unable to start.
If Windows 8 is able to start and run, you can reboot right into Recovery Environment or use the Refresh and Reset your PC options.
If you do not have the Windows 8 installation DVD (e.g. Windows 8 came pre-installed), grab the
90-day Windows 8 Enterprise evaluation DVD from MSDN (you need to sign in with your Windows Live ID).
The last resort is to use your Data Recovery CD/USB for fixing errors on disk or repairing Master Boot Records (MBR), but other options of
Repair Your Computer are unavailable.
If the above provided information does not help you resolving the issue then I would suggest you to perform the following steps and check:
a) Re-format your hard drive and do a “clean-install” Windows 8 OS.
b) Another method is to insert the Windows 8 disc, Boot into “Repair your computer” and select Troubleshoot > advanced options. Go into the MS-DOS mode by choosing Command Prompt, type the command to run:
BCDboot c:\windows /s c: /l en-us
Unlock a BitLocker-protected drive:
http://windows.microsoft.com/en-CA/windows-8/unlock-bitlocker-protected-drive
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