vCentre server failed to start

After rebooted the Windows Server 2008, vCentre server failed to start; and found below;

• the vSphere client cannot connect to vCenter Server
• and remote desktop connect to the vCenter Server and found that VirtualCenter Server service did not start, even manually restart it, still fai

Below are the Error Messges / Symptoms;

• found a Microsoft Windows Event error in the system log -
• The Event properties - Event 7024, Service Control Manager
• The VMware VirtualCenter Server service terminated with service-specific error. The system cannot find the file specified.
• If vCenter Server is using Microsoft SQL, the vpxd.log shows the error:
• ODBC error: (08001) - [Microsoft][ODBC SQL Server Driver][DBMSLPCN]SQL Server does not exist or access denied

Solution The password accessing the VCDB could be corrupted; need to reset it.
Click Start, then type cmd in the search box.

1. When cmd.exe appears, right-click it and choose "Run as administrator". The command prompt window opens.
2. Navigate to the directory in which vCenter Server is installed
3. In vCenter Server 4.x and 5.x, it is installed by default in:
• C:\Program Files\VMware\Infrastructure\VirtualCenter Server\
4. Run the command:
• vpxd.exe -p
5. When prompted, enter the new password and press Enter.
6. Retype the pasword and press Enter again to complete the password change.
7. You must change the password through the command line, as it is encrypted in the registry.