Fatal Error c000021a - What is it?
Fatal Error c000021a is a type of Windows stop error also known as the blue screen of death (BSoD) error. When this error occurs, it causes the computer screen to go blue and locks the user out of the current activity.
This error code is fatal and can lead to serious issues like system crashes and freeze.
The error code is usually displayed in the following format:
STOP: c000021a {Fatal System Error}
The Windows Logon Process system process terminated unexpectedly with a status of 0xc0000034 (0x00000000 0x0000000)
Solution
Error Causes
Fatal Error c000021a occurs when the Windows kernel detects that either Winlogon.exe or Csrss.exe service processes have stopped responding or failed to load. When this happens the error code pops up on the screen.
Nonetheless, this is not the only reason for the occurrence of this error. There are plenty more reasons why Fatal Error c000021a may pop on your computer screen. These include:
- Missing or corrupt hardware drivers
- Faulty hardware
- Windows System Restore failed during the rollback process
- Malware or viral infection
- Registry issues
No matter what the reason may be, it is advisable to fix the error right away without any delays. Remember it is a fatal error and can cause a great deal of damage to your PC.
Further Information and Manual Repair
Fatal Error c000021a is a serious PC issue but this does not mean you have to hire an expert to get it fixed. The good news is that this error is actually quite easy to resolve.
You don’t have to be a technical whiz or a computer programmer to fix Fatal Error c000021a on your PC.
Here are some do it yourself methods to fix this error code right away without any hassle:
Let’s get started:
Method 1: Update Your PC Drivers
As we mentioned about corrupt or missing drivers can be one of the many reasons for the occurrence of this error. So, check the drivers first. Perform a driver scan and make sure all your drivers are updated.
Method 2: Perform a Windows System Restore
To do this, first
launch Task Manager by pressing CTRL+SHIFT+ESC on your keyboard. Now click on the application tab and then click ‘New Task’ then browse.
After that, go to C:\Windows\System32\Restore folder and then double click the rstrui.exe file. This will help start system restoration. Your computer will reboot during the process and hopefully, the error will be resolved.
Nonetheless, if the error still persists then try methods 3 and 4.
Method 3: Scan for Viruses
Sometimes Fatal Error c000021a may also occur due to
malware infection. Your PC may be affected by viruses hidden in different locations without you knowing about it.
Therefore to resolve this error, it is recommended to run an antivirus and scan for viruses. If detected, remove them right away to fix the error code.
Method 4: Repair the Registry
Another method to resolve Fatal Error c000021a code on your system is to
repair the registry. The registry stores all the information and activities performed on the system.
If it is not cleaned frequently, it gets loaded with too many files unnecessary and obsolete files like the junk files, cookies, internet history and temporary files which corrupts and damages the registry thereby generating blue screen of death error codes like Fatal Error c000021a.
Though you can repair the registry manually it can be both time-consuming and slightly difficult especially if you are not a computer programmer. Therefore it is advisable to download a registry cleaner to fix it right away.
Automatic Repair with Restoro.
Whether the Fatal Error c000021a code occurs due to viral infection or registry issues, download Restoro. This is a next-generation, advanced, and multi-functional PC Fixer. This software is deployed with multiple utilities such as a powerful registry cleaner, an antivirus, a system optimizer, and more.
The registry cleaner scans the entire PC and detects all types of registry issues at once. It cleans the registry, wipes out all the unnecessary files, and restores the registry back to normal.
Simultaneously, the antivirus embedded in this software detects all types of viruses including malware, adware, spyware and Trojans and removes them in seconds.
The system optimizer feature ensures the speed and performance of your PC are not compromised during the repairing process. It ensures your PC works at its optimal speed.
Restoro is a one-stop solution for all your PC needs. It has a user-friendly interface making it easy for all levels of users to work around. It is compatible with all Windows versions
Click here to download Restoro and resolve the Fatal Error c000021a code on your PC today!
The true cause is that there is no working Border Gateway Protocol (BGP) routes into Facebook's sites. BGP is the standardized exterior gateway protocol used to exchange routing and reachability information between the internet top-level autonomous systems (AS). Most people, indeed most network administrators, never need to deal with BGP.
Cloudflare VP Dane Knecht was the first to report the underlying BGP problem. This meant, as Kevin Beaumont, former Microsoft's Head of Security Operations Centre, tweeted,
"By not having BGP announcements for your DNS name servers, DNS falls apart = nobody can find you on the internet. Same with WhatsApp btw. Facebook has basically de-platformed themselves from their own platform."
Many people are very annoyed by this and with the fact that they cannot use their social media platforms but it seems that Facebook employees are in even bigger annoyance as it was reported that Facebook employees can't enter their buildings because their "smart" badges and doors were also disabled by this network failure. If true, Facebook's people literally can't enter the building to fix things.
Reddit user u/ramenporn, who claimed to be a Facebook employee working on bringing the social network back from the dead, reported, before he deleted his account and his messages:
"DNS for FB services has been affected and this is likely a symptom of the actual issue, and that's that BGP peering with Facebook peering routers has gone down, very likely due to a configuration change that went into effect shortly before the outages happened (started roughly 1540 UTC). There are people now trying to gain access to the peering routers to implement fixes, but the people with physical access is separate from the people with knowledge of how to actually authenticate to the systems and people who know what to actually do, so there is now a logistical challenge with getting all that knowledge unified. Part of this is also due to lower staffing in data centers due to pandemic measures."
Ramenporn also stated that it wasn't an attack, but a mistaken configuration change made via a web interface.
Both BGP and DNS are down, the "connection to the outside world is down, remote access to those tools don't exist anymore, so the emergency procedure is to gain physical access to the peering routers and do all the configuration locally."
Technicians on site don't know how to do that and senior network administrators aren't on site.
It seems that it will all be down for a couple of more hours before the issue is resolved. 