Blue screen error - c000021a Fatal system error

[CoolDefender]

I Own HP ENVY 4-1046tx Ultrabook
Last time i forced shutdown the laptop (because it got hanged!)

and after that i got this error

safe mode is not work
and last know good configration disnt have any effect.

sugguest a way out of this....!!!!!

[Mumbodog]

Something got scrambled in the file system on the hard shutdown.

Can you load Windows recovery environment using F8 > Repair my computer

If recovery environment will load, cancel any repair it tries to do automatically, then choose the command prompt tool.

Once cmd window opens type:

chkdsk /r 😧

😧 is actually C: drive when you are in recovery environment using the command prompt on a factory configured HP notebook with one hard drive and 4 partitions.

be sure to include the 2 spaces.

Hit enter key and let it run, do not interrupt it, it may take a long time to complete depending on the size of the hard drive.

when it completes close cmd window and hit the restart button.

See if it will start up now.

If you want to be sure you are running chkdsk on the proper partition, you can use these commands when the cmd window opens.

Diskpart

(hit enter)

list volume

(hit enter)

it will list the partitions and associated drive letters on the hard drive, make note of the largest drive letter , this will be the partition you want to run chkdsk on.

type:

exit

(exits diskpart, important you do this)

then run the chkdsk /r   command.

.

[CoolDefender]

list volume command showed

Clear from above that mine F (os) drive is maximum so i applied
chkdsk /r F:

but same blue screen appears

so i also applied chkdsk /r 😧

but not worthy again.



so what should i do now...!??

[Mumbodog]

Now run a offline System File Checker, read carefully.

http://mikemstech.blogspot.com/2011/12/how-to-perform-offline-system-integrity.html

run it using F: your OS drive.

[CoolDefender]

When i run sfc /scannow

it showed
"There is a system repair pending which requires reboot to complete. Restart Windows and run sfc again."

for this i tried 
sfc /SCANNOW /OFFBOOTDIR=c:\ /OFFWINDIR=f:\Windows

but it showed 

after exit restarted the laptop but the asme blue screen appears...

any other suggestion.

[Mumbodog]

This is usually due to malware infection that has changed some critical system settings.

Make this boot CD on another Windows PC, and do an offline scan, see if it finds anything and let it remove it.

choose the bit version for the system being scanned, not the system you make the disc on.

http://windows.microsoft.com/en-US/windows/what-is-windows-defender-offline

After this see if it will boot into windows.

[CoolDefender]

1. ya i made a boot windows-defender-offline

 
it was made properly and also boot but in the process it showed the error

[CoolDefender]

Also I made bootable pen drive of window 7

but it didn’t show any drive to install window…!!!

[Mumbodog]

I cannot see your image yet, it has not been approved.

Enter the bios and run the hard drive and memeory diagnostics, see if it returns any errors or messages.

[CoolDefender]

Oh k
by using hp basic system diagnostics
done hard disk check
result
smart check:passed
long dst:passed

also done the memory test
result passed.