C000021a Unknown Error
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C000021a Error Message
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Stop: C0000221 Unknown Hard Error
0 Sign in to vote I have Windows 2003 Standard Server, whichis also Citrix Server which reboots over night.I keep getting th Blue of Death and this error Thursday, September 30, 2010 6:48 AM Reply | Quote Answers 0 Sign in to vote Hi, Please first http://www.techsupportforum.com/forums/f299/solved-c000021a-unknown-hard-error-and-many-more-186473.html make sure the system is up to date with the latest batch. Then, check this article: http://support.microsoft.com/kb/316503 If the problem continues, please understand that to troubleshoot the blue screen/restarting issues, we usually need to perform debugging. However, in this forum, we do not provide debugging support. If you would like to perform debugging, please contact Microsoft Customer Support https://social.technet.microsoft.com/Forums/windowsserver/en-US/1d61b407-7967-4897-8eba-8a807f1ce255/stop-c000021a-unknown-hard-error?forum=winservergen Service (CSS). To obtain the phone numbers for specific technology request, please refer to the website listed below: http://support.microsoft.com/default.aspx?scid=fh;EN-US;PHONENUMBERS If you are outside the US, please refer to http://support.microsoft.com for regional support phone numbers. I hope your issue can be resolved soon. Marked as answer by Bruce-Liu Thursday, October 07, 2010 12:43 PM Thursday, September 30, 2010 11:37 AM Reply | Quote Microsoft is conducting an online survey to understand your opinion of the Technet Web site. If you choose to participate, the online survey will be presented to you when you leave the Technet Web site.Would you like to participate? Privacy statement © 2016 Microsoft. All rights reserved.Newsletter|Contact Us|Privacy Statement|Terms of Use|Trademarks|Site Feedback TechNet Products IT Resources Downloads Training Support Products Windows Windows Server System Center Browser Office Office 365 Exchange Server SQL Server SharePoint Products Skype for Business See all products » Resources Evaluation Center Learning Resources Microsoft Tech Companion App Microsoft Technical Communities Microsoft Virtual Academy Script Center Server and Tools Blogs TechNet Blo
Blue Screen of Death Stop Error c000021a Windows and Linux Tutorials from Howtech SubscribeSubscribedUnsubscribe25,19525K Loading... Loading... Working... Add to Want to https://www.youtube.com/watch?v=czmZ2HFx6q4 watch this again later? Sign in to add this video to a playlist. Sign in Share More Report Need to report the video? Sign in to report inappropriate content. Sign in Transcript Statistics 198,499 views 173 Like this video? Sign in to make your opinion count. Sign in 174 259 Don't unknown hard like this video? Sign in to make your opinion count. Sign in 260 Loading... Loading... Transcript The interactive transcript could not be loaded. Loading... Loading... Rating is available when the video has been rented. This feature is not available right now. Please try again later. Published on Jul 8, 2013Learn how to unknown hard error fix the blue screen of death stop error c000021a. Follow this tutorial to learn what causes it.Don't forget to check out our site http://howtech.tv/ for more free how-to videos!http://youtube.com/ithowtovids - our feedhttp://www.facebook.com/howtechtv - join us on facebookhttps://plus.google.com/1034403827176... - our group in Google+In this tutorial, we will teach you how to fix blue screen of death stop error c000021a.The error "c000021a" occurs when the user-mode subsystem has been compromised and its security is in question. The user-mode subsystem refers to the Client Server Run-Time Subsystem (CSRSS) or WinLogon. Then the security is under question, the operating system operates in kernel mode. Windows cannot run properly without WinLogon or CSRSS.Step 1 -- Error c000021aThis blue screen of death stop error c000021a will be displayed when your system is in normal booting process. When the windows logo screen will appear, you will suddenly see the c000021a Fatal System Error.Step 2 -- Last Known Good Configurat