Windows 7 Forums
Welcome to Windows 7 Forums. Our forum is dedicated to helping you find support and solutions for any problems regarding your Windows 7 PC be it Dell, HP, Acer, Asus or a custom build. We also provide an extensive Windows 7 tutorial section that covers a wide range of tips and tricks.

Windows 7: Stop c000021a

03 May 2009   #1

Windows 7 X64
Stop c000021a

I have a Toshiba L355D-7901 I have gotten this BSOD error with every version of 7. I've tried a number of things I think the machines going to need some BIOS update or something. Anyone have any ideas?

STOP: c000021a {Fatal System Error}
The Initial Session Process or System process terminated unexpectedly with a status of 0x00000001 (0x00000001 0x0010408)
The system has been shutdown.

Processor and Chipset3
• AMD Turion™ X2 Dual-Core Mobile Processor RM-72
o 2.1 GHz, 1MB L2 Cache, HyperTransport™ 3: up to 3.6
• AMD M780G chipset Memory4
• Configured with 4GB PC6400 DDR2 SDRAM
Storage Drive5
• 250GB (5400 RPM) Serial ATA hard disk drive
Fixed Optical Disk Drive6
• DVD SuperMulti (+/-R double layer) with Labelflash™ drive supporting
11 formats
o Maximum speed and compatibility: CD-ROM (24x), CD-R (24x),
CD-RW (24x), DVD-ROM (8x), DVD-R (Single Layer, (8x)),
DVD-R (Double Layer, (6x)), DVD-RW (6x), DVD+R (Single
Layer, (8x)), DVD+R (Double Layer, (6x)), DVD+RW (8x), DVDRAM
o Supports Labelflash™ media to burn high quality labels directly
on the disk.
• 17.0” diagonal widescreen TruBrite® TFT LCD display at 1440x900
native resolution (WXGA+)
o Native support for 720p content
• ATI Radeon™ 3100 Graphics with 256MB-1406MB dynamically
allocated shared graphics memory
• Built-in stereo speakers
• Sound volume control dial
• Built-in microphone
Input Devices
• 104 key US with 10-key
• TouchPad™ pointing device
• TouchPad™ Enable/Disable
• Control Buttons:
o Mute button
o Media button
o CD/DVD control buttons (Play/Pause, Stop, Previous Track, Next
• Webcam and microphone built into LCD bezel
• Modem9
• 10/100 Ethernet
• Integrated Wi-Fi® compliant wireless:10
o Atheros® 802.11b/g wireless-LAN
• 2 main memory slots. Both slots may be occupied.
• ExpressCard™ slot (ExpressCard/34 and ExpressCard/54)
• 4-in-1 Bridge Media Adapter
o Secure Digital, Secure Digital High Capacity, Memory Stick™,
Memory Stick PRO™, MultiMedia Card [shared slots]
• Video

My System SpecsSystem Spec
03 May 2009   #2


Wow! Nice system!. Updating the BIOS would not be a bad idea. If you can boot up in safe mode, check the Event Log for other indicators of the error. Check this Blue Screen of Death Survival Guide: Every Error Explained - Page 1 | Maximum PC for help of BSOD's.

Where you upgrading or clean install? Where you installing the 64 bit version? It sounds like either a BIOS compatibility issue or a 64 bit driver issue. You could try installing the 32 bit version of Windows 7 RC when it is available or get it from torrent.
My System SpecsSystem Spec
04 May 2009   #3

Windows 7 X64

Thanks got it at Best Buy for $599 upgraded the RAM for 20 bucks. I'm trying to get the x64 to work and I did try a few x86 builds with the same results. I also updated the BIOS to the latest available from Toshiba but no go. I would think a driver issue also but it will do it on a fresh install with no updates or drivers, it also does it with the drivers. BTW Toshiba has x64 drives available for this laptop you would think they would work.
My System SpecsSystem Spec

20 Jun 2009   #4

Windows 7 RTM Professional x64

I have the same system, only had it about 5 weeks but I was able to install Windows 7 RC x86 with no problem. I did have BSOD issues when I tried to install the x64 version. Right now I am re-downloading x64 and am going to try burning at a slower speed. I have a hdd that I have Vista x64 Ultimate installed on with no issues so my Win7 x64 install was either a bad burn, bad download or the Windows 7 x64 RC is flawed. I will post my results in a while.

When I tried to update my bios, Toshiba said it was already at the latest version.
My System SpecsSystem Spec
20 Jun 2009   #5
Microsoft MVP


This is a nasty error that can be caused by many different things.
I don't think that I've encountered one in Windows 7 yet either.
Here's a link to a brief description of the error: Troubleshooting Windows STOP Messages

As the description states, it's one of the few cases where the failure of a user-mode process can cause a BSOD. Determining which process is the difficult part tho'.

Most fixes that I've seen in Vista revolved around:
- malware
- Windows Updates
- registry corruption

Windows7 compatibility is a tricky issue, and the lower the functioning of the drivers is, the less likely it is that they will be compatible. In the past the Toshiba BIOS has given me fits, not wanting to work with bootable media and tests that work on the majority of other systems (so it could be a BIOS incompatibility).

If you're able to get into Safe Mode, please go to C:\Windows\Minidump and zip up the files located there and upload them with your next post. If there aren't any there (or you have problems with them), let us know.

Also in Safe Mode, try the Startup Repair tool (the Repair your computer option). Then, in Safe Mode, try the Vista big 4 troubleshooting tools (not all will work in Safe Mode). Go to start and type one of the following and press Enter:

perfmon /report
reliability monitor
event viewer

Look for errors in each of the reports. In Event Viewer, look under the Windows Logs for the System log files and look for errors around or shortly before the BSOD occurred.
My System SpecsSystem Spec
20 Jun 2009   #6

Windows 7 RTM Professional x64

The first few times I tried installing Windows 7 x64 RC, I was able to get it installed but on the first reboot I would get a BSOD. I didn't bother writing down the error codes, just kept trying. Finally gave up on x64 and was able to install x86 with no problems what so ever. I then swapped hdds and was able to install Vista Ultimate x64 also with no problems what so ever. I have that hdd in now. My last 3 attempts after re-downloading and re-burning ended with the same results of the OP.
My System SpecsSystem Spec
06 Jul 2009   #7

Windows 7 X64

I had no problems with Vista x64 either its just x64 7. I thought it had something to do with driver signing but I tried the laptop in test mode and got the same results.
My System SpecsSystem Spec
07 Aug 2009   #8

Windows 7 RTM Professional x64

Apparently this has not been fixed ion the Windows 7 x64 RTM. I downloaded and installed it last night, got through the install with no problem but after the Windows update and reboot, BSOD and error message appeared. The x86 RTM works fine just like the x86 RC did.
My System SpecsSystem Spec
07 Aug 2009   #9

Win 8 Release candidate 8400

Quote   Quote: Originally Posted by rgartin View Post
Apparently this has not been fixed ion the Windows 7 x64 RTM. I downloaded and installed it last night, got through the install with no problem but after the Windows update and reboot, BSOD and error message appeared. The x86 RTM works fine just like the x86 RC did.

Have you seen this How to troubleshoot a "STOP 0xC000021A" error

My System SpecsSystem Spec
07 Aug 2009   #10

vista x64

I have a similar model toshiba laptop and I have had the same issues for months, with EVERY build it windows 7, usually putting in a vista disc and formatting the HD would fix it, but with the final RTM that doesn't even work.

I can put the dvd in and it will load drivers and get to the point were it has the windows 7 logo with the flying colored logo, then it stops and blue screens, I can't even get a chance to partition the hard drive or anything.

I updated my bios today thinking that would help but it didn't. Looks like im stuck with vista or have to get a 32 bit OS.

This is just stupid microsoft hasn't realized this problem and let an OS go out the door in this condition.
My System SpecsSystem Spec

 Stop c000021a

Thread Tools

Similar help and support threads
Thread Forum
STOP:c000021a [fatal system error]
hello,while playing games online, my system gets shutdown and if i restart, i will be getting " STOP:c000021a " over blue screen. in order to start, i have to do restart several times.. any body can tell me how to fix this and what is actually ment by fatal system error? waiting for help..
BSOD Help and Support
System Unbootable, error: stop: c000021a
Well I had the brilliant idea to delete the manufacturer's recovery partition on my ASUS Win 7 64-bit laptop, and reclaim that space for my C drive, and now my system is unbootable. I get the error message "autochk program not found" then stop: c000021a Fatal System Error. I have run System...
General Discussion
win7 64x stop: c000021a
Hello, I am new visiter in these forum. I have problem in my PC can't be start :cry: at winlog. it is give message blue screen you can see in these link:
BSOD Help and Support
BSOD - Stop: C000021A {Fatal System Error}
I have been having some issues with various BSOD's, I listed my most previous BSOD here on the forums and thought that I might have had this BSOD issue fixed (well, hopefully!) - it was related to AVG and possibliy conflicting with MSE, as no virus db was listed, you can see it here on the forum ...
BSOD Help and Support
BSOD, Stop: c000021a fatal system error
Dear Support, I have a Sony Vaio VPCZ1 laptop which has been working great up until yesterday. I now have the following problems: - When choosing to boot normally I get BSOD; STOP: c000021a {Fatal System Error} The Windows Logon Process system process terminated unexpectedly with a...
BSOD Help and Support

Our Sites

Site Links

About Us

Find Us

Windows 7 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 7" and related materials are trademarks of Microsoft Corp.

© Designer Media Ltd

All times are GMT -5. The time now is 03:15.
Twitter Facebook Google+