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Windows 8 doesn't boot. Error 0xc000021a


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#1 frootqloop

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Posted 01 July 2013 - 07:48 PM

I have a g75vw Asus laptop which for the most part has worked fine. Late June the computer simply wouldn't boot into windows giving the error 0xc000021a next to the " :( " icon. This computer was originally using windows 7 but I upgraded soon after windows 8 was released in October. For about a week before the crashing, I had been using a ubuntu 12.04 live boot jump drive for learning python. It was after a linux boot that the computer crashed but I do not think the events are related. I had also installed connectify.me, a program that turns a laptops wi-fi adapter into a router which worked well for about a week before the crash. I have gone through all of the generic hoops including safe mode(s) system recovery using a usb flash drive, refresh, and the existent yet worthless self diagnosing tool. Microsoft was unable to help without a 100 dollar fee. 



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#2 Broni

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Posted 01 July 2013 - 08:34 PM

0xc000021a error usually means some issue with crucial system files, which could be actually caused by some bad hardware as well.

 

I'd start with checking hard drive...

 

Run hard drive diagnostics: http://www.bleepingcomputer.com/forums/topic28744.html/page__view__findpost__p__160520
Make sure, you select tool, which is appropriate for the brand of your hard drive.
Depending on the program, it'll create bootable floppy, or bootable CD.
If downloaded file is of .iso type, use ImgBurn: http://www.imgburn.com/ to burn .iso file to a CD (select "Write image file to disc" option), and make the CD bootable.
For Toshiba hard drives, see here: http://storage.toshiba.com/storage-services-support/warranty-support/software-utilities#diagnostic

Note : If you do not know how to set your computer to boot from CD follow the steps here


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#3 frootqloop

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Posted 03 July 2013 - 12:43 AM

Thank you for the speedy response. I did as you recommended and due to either my incompetency, my hard drives issues, or the inabilities of WinDFT, was unable to get the WinDFT live boot CD to fix my issues. It simply was unable to recognize the existence of my HTS727575A9E364. I tried all the various combinations of settings.

 

http://www.hgst.com/support/index-files/simpletech-legacy-downloads

the "pre-2013" version is the only one that seems to live boot into its own little program, and it doesn't see my hard drive. (which makes sense considering I think it is looking for older hardware) regardless I don't know exactly what program I should be using. "WinDFT" only works while running windows, which I am obviously not able to do.

 

Obviously my hard drive is connected and at least readable considering I can access it via command line while in windows recovery and the fact that when I'm live booting in Ubuntu, I've no trouble navigating through my files.

 

Thank You. 



#4 Broni

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Posted 03 July 2013 - 07:18 PM

Here is .iso file you can burn to the CD: https://www1.hgst.com/hdd/support/downloads/dft32_v416_b00.iso


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