The procedure entry point LdrSystemDllInitBlock could not be located in the dynamic link library ntdll.dll

Hi David,

1. Do you remember making any changes to the computer prior to the issue?

2. Is the computer on a domain?

This issue may occur if the file ntdll.dll is damaged.

Here are a few methods which you can follow to resolve the issue:

Method 1:

I would suggest you to run SFC scan to check for missing or corrupted system files. To do this, follow the steps mentioned in the link :
How to use the System File Checker tool to troubleshoot missing or corrupted system files on Windows Vista or on Windows 7
http://support.microsoft.com/kb/929833

Method 2:

I would suggest you to re-register the dll (Dynamic Link Library) file from an elevated command prompt.

a. Click on Start.

b. Type Cmd.exe.

c. Right click on cmd.exe and select Run as administrator.

d. Type regsvr32 ntdll.dll and press Enter.

Method 3:

Step 1:

You may try to boot in safe mode and check if the issue persists. Only the basic files and drivers necessary to run Windows are started. If an existing problem doesn't reappear when you start in safe mode, you can eliminate the default settings and basic device drivers as possible causes. To boot in safe mode follow the link.

http://windows.microsoft.com/en-US/windows7/Start-your-computer-in-safe-mode

Step 2:

If the issue does not occur in safe mode then boot to the desktop in normal mode and check which of the third party program is causing the issue. To configure your computer to clean boot follow the link given below.

How to perform a clean boot to troubleshoot a problem in Windows Vista, Windows 7, or Windows 8
http://support.microsoft.com/kb/929135

Note: Refer "How to reset the computer to start as usual after troubleshooting with clean boot"

under more information to reset the computer to start as normal after troubleshooting.

Hope this resolves the issue. If the issue persists, you can write to us and we will be glad to assist you further.