Fatal System Error on Laptop Running Windows 7 STOP: c000021a The Verification of a KnownDLL Failed. (18186 Views)
Reply
Student
SirenSerenade
Posts: 1
Registered: ‎08-13-2012
Message 1 of 2 (18,186 Views)

Fatal System Error on Laptop Running Windows 7 STOP: c000021a The Verification of a KnownDLL Failed.

When I attempt to boot my laptop, which is running Windows 7 OS, it bluescreens and I get the following message: "STOP: c000021a {Fatal System Error} The verificaion of a KnownDLL failed. system processes terminated unexpectedly with a status of 0xc0000020 (0x00331290 0x00000000). The system has been shut down." Is there any way I can fix this without doing a factory reset and losing all of my files? I have tried doing a system restore but it tells me that I have no restore points and that since I am running it within a limited diagnostic capacity that it cannot be undone, which is fine as long as it is a restore. The problem is that it won't let me do that. I should also note that I have no external hard drive and for some reason booting the "Last Known Good Configuration" will not work, either. I should probably mention that I am unable to boot in Safe Mode.

Details:
Problem Event Name: StartupRepairOffline
Problem Signature 01: 6.1.7600.16385
Problem Signature 02: 6.1.7600.16385
Problem Signature 03: unknown
Problem Signature 04: 21200344
Problem Signature 05: AutoFailover
Problem Signature 06: 8
Problem Signature 07: BadDriver
OS Version: 6.1.7600.2.0.0.256.1
Locale ID: 1033
 
Please help! I don't have any money to get this laptop fixed and I need it for school (including files on it which are necessary for my portfolio). Thank you!
Associate Dean
Mumbodog
Posts: 11,026
Registered: ‎01-11-2010
Message 2 of 2 (18,168 Views)

Re: Fatal System Error on Laptop Running Windows 7 STOP: c000021a The Verification of a KnownDLL Fai

Use F8 at the very start of power up to access the advanced screen, choose "repair your computer" from the list, this will load windows recovery environment, if it tries to do an automatic repair, cancel it if you can and let RE load, then choose "Command prompt" from the list of tools.

F8 repair-your-computer-windows-7.png

 

.

 

System Recovery Options Command Prompt.png

 

 

 

 

try running a system file checker as described in the link below, it may repair the problem file, once SFC is complete restart the pc normally.

 

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

 

† The opinions expressed above are the personal opinions of the authors, not of HP. By using this site, you accept the Terms of Use and Rules of Participation