Got an error code of the following: stop: c000021a (fatal system
error) the verification of a knowndll failed. system process terminated
unexpectedly with the status of 0xc0000020
(ox8a3a36c8 0x00000000). the system has shut down.
Method 1
Last known good configuration
It's a Windows startup option that uses the most recent system settings that worked correctly. Every time you turn your computer off and Windows shuts down successfully, important system settings are saved in the registry. If a problem occurs, you can restart your computer using those settings. For example, if a new driver for your video card is causing problems, or an incorrect registry setting is preventing Windows from starting correctly, you can restart your computer using Last Known Good Configuration.
1. Remove all floppy disks, CDs, and DVDs from your computer, and then restart your computer by clicking the Start button, clicking the arrow next to the Shut Down button, and then clicking Restart.
2. Do one of the following:
· If your computer has a single operating system installed, press and hold the F8 key as your computer restarts. You need to press F8 before the Windows logo appears. If the Windows logo appears, you'll need to try again by shutting down and restarting your computer.
· If your computer has more than one operating system, use the arrow keys to highlight the operating system you want to start, and then press F8.
3. On the Advanced Boot Options screen, use the arrow keys to highlight Last Known Good Configuration (advanced), and then press Enter.
4. If your computer has more than one operating system installed, use the arrow keys to highlight the operating system that you want to start by using Last Known Good Configuration, and then press Enter. Windows will then resume starting normally.
Method 2
Chkdsk (Chkdsk.exe) is a command-line tool that checks volumes for problems. The tool then tries to repair any that it finds.
1. Boot from the DVD
2. Select the Language
3. Click on "Repair your Computer" on the Install now screen
4. Click next on the System Recovery Options screen
5. Click on Command prompt.
6. Type the command chkdsk and press enter
Method 3
Offline system restore.
1. Boot from the DVD
2. Select the Language
3. Click on "Repair your Computer" on the Install now screen
4. Click next on the System Recovery Options screen
5. Click on System Restore.
6. Choose the date to which you want to restore
Refer this link for more information.
A Windows Vista-based computer that has a Windows Recovery Environment (Windows RE) partition is not successfully restored by using Windows Complete PC Backup and Restore
http://support.microsoft.com/kb/946010
Method 1
Last known good configuration
It's a Windows startup option that uses the most recent system settings that worked correctly. Every time you turn your computer off and Windows shuts down successfully, important system settings are saved in the registry. If a problem occurs, you can restart your computer using those settings. For example, if a new driver for your video card is causing problems, or an incorrect registry setting is preventing Windows from starting correctly, you can restart your computer using Last Known Good Configuration.
1. Remove all floppy disks, CDs, and DVDs from your computer, and then restart your computer by clicking the Start button, clicking the arrow next to the Shut Down button, and then clicking Restart.
2. Do one of the following:
· If your computer has a single operating system installed, press and hold the F8 key as your computer restarts. You need to press F8 before the Windows logo appears. If the Windows logo appears, you'll need to try again by shutting down and restarting your computer.
· If your computer has more than one operating system, use the arrow keys to highlight the operating system you want to start, and then press F8.
3. On the Advanced Boot Options screen, use the arrow keys to highlight Last Known Good Configuration (advanced), and then press Enter.
4. If your computer has more than one operating system installed, use the arrow keys to highlight the operating system that you want to start by using Last Known Good Configuration, and then press Enter. Windows will then resume starting normally.
Method 2
Chkdsk (Chkdsk.exe) is a command-line tool that checks volumes for problems. The tool then tries to repair any that it finds.
1. Boot from the DVD
2. Select the Language
3. Click on "Repair your Computer" on the Install now screen
4. Click next on the System Recovery Options screen
5. Click on Command prompt.
6. Type the command chkdsk and press enter
Method 3
Offline system restore.
1. Boot from the DVD
2. Select the Language
3. Click on "Repair your Computer" on the Install now screen
4. Click next on the System Recovery Options screen
5. Click on System Restore.
6. Choose the date to which you want to restore
Refer this link for more information.
A Windows Vista-based computer that has a Windows Recovery Environment (Windows RE) partition is not successfully restored by using Windows Complete PC Backup and Restore
http://support.microsoft.com/kb/946010
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