Solution: The credentials provided for SQL Server Agent service by installing SQl 2008 are invalid

Problems with installing SQL Server 2008 on Windows Server 2008:

The following problems occurred in the "Server Configuration" phase during installation:
The credentials provided for the sql server proxy service are invalid
The credentials specified for the sql server service are invalid
The credentials provided for the analysis services service are invalid
The credentials provided for the reporting services service are invalid
The credentials provided for the integration services service are invalid

resolvent:

SQL Server Agent Select SYSTEM
SQL Server database engine Select NETWORK SERVICE
Select NETWORK SERVICE for SQL Server analysis services
Select NETWORK SERVICE for SQL Server reporting services
Select NETWORK SERVICE for SQL Server integration services

　　　　 Mixed Mode: Missing System Administrator

solve: