Windows 8 system doesn't get internet, says system event log on service has some problem of STOP 0xC000021A error which system restarts very slowly

Hi, my system runs on windows 8 on hp laptop envy series. All of a sudden, system event log on service stopped, errors which prevented the system to log on services. It displayed error of STOP 0xC000021A when i use system restore to roll back to previous
configuration. Also when I tried to refresh my pc, it says i can't do changes as log in was switched to prevent the changes by notification.I don't know what to do next, I tried to put recovery dvds which I made when system was bought, now not at all working.
Internet is not active, not able to resolve by trouble shooting and system taking lot of time to get dsktop. Previously I used to get my desktop in 10 seconds. Now its 10 min. May be I m infected with virus. My files, they are there. I tried to transfer some
files by pendrive to another system, now the new system(where i put my files in another system) crashed, windows 7 system which does not display desktop, icons etc and not at all workable. 
Also in my hp system, i m unable to open control panel. if its opened, it will not go off, when i use task manager, it says explorer and shuts down. I had to force restart the system. Please resolve something to get my hp laptop workable. I m waiting for
my MS thesis to be working on that. My files are locked and no way to transfer, I fear of infected by virus to another computer also. 
Pls give instructions to hw to set my hp laptop at the earliest without losing any of the files. Idon't want to reinstall and lose all the data for timebeing. Else, inform me the option for copying data safely. I tried to change the adv startup and recovery
by changing the boot sequence by DVD but this also shows error 0xC000021A and asks us to see the details. I didn't understand all this. Pls help asap.
Thanks
venkata
STOP 0xC000021A

MV
If you can boot either from the win 8 dvd or in safe mode we need the DMP files
We do need the actual DMP file as it contains the only record of the sequence of events leading up to the crash, what drivers were loaded, and what was responsible.  
WE NEED AT LEAST TWO DMP FILES TO SPOT TRENDS AND CONFIRM THE DIAGNOSIS.
Please follow our instructions for finding and uploading the files we need to help you fix your computer. They can be found here
If you have any questions about the procedure please ask
Wanikiya and Dyami--Team Zigzag

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