ERROR 1045: Access denied for user: 'root@localhost'

C:\>c:\mysql\bin\mysqld-nt --skip-grant-tables

 C:\>c:\mysql\bin\mysqladmin -u root 

c:\mysql\bin\mysqladmin  Ver 8.40 Distrib 4.0.21, for Win95/Win98 on i32
Copyright (C) 2000 MySQL AB & MySQL Finland AB & TCX DataKonsult AB
This software comes with ABSOLUTELY NO WARRANTY. This is free software,
and you are welcome to modify and redistribute it under the GPL license

Administration program for the mysqld daemon.
Usage: c:\mysql\bin\mysqladmin [OPTIONS] command command....
  -c, --count=#       Number of iterations to make. This works with -i
                      (--sleep) only
  -#, --debug[=name]  Output debug log. Often this is 'd:t:o,filename'
  -f, --force         Don't ask for confirmation on drop database; with
                      multiple commands, continue even if an error occurs.
  -C, --compress      Use compression in server/client protocol
  --character-sets-dir=name
                      Directory where character sets are.
  -?, --help          Display this help and exit.
  -h, --host=name     Connect to host
  -p, --password[=name]
                      Password to use when connecting to server. If password is
                      not given it's asked from the tty.
  -W, --pipe          Use named pipes to connect to server.
  -P, --port=#        Port number to use for connection.
  -r, --relative      Show difference between current and previous values when
                      used with -i. Currently works only with extended-status.
  -O, --set-variable=name
                      Change the value of a variable. Please note that this
                      option is deprecated; you can set variables directly with
                      --variable-name=value.
  -s, --silent        Silently exit if one can't connect to server
  -S, --socket=name   Socket file to use for connection.
  -i, --sleep=#       Execute commands again and again with a sleep between.
  -u, --user=name     User for login if not current user.
  -v, --verbose       Write more information.
  -V, --version       Output version information and exit
  -E, --vertical      Print output vertically. Is similar to --relative, but
                      prints output vertically.
  -w, --wait[=#]      Wait and retry if connection is down
  --connect_timeout=#
  --shutdown_timeout=#

Variables (--variable-name=value)
and boolean options {FALSE|TRUE}  Value (after reading options)
--------------------------------- -----------------------------
count                             0
force                             FALSE
compress                          FALSE
character-sets-dir                (No default value)
host                              (No default value)
port                              3306
relative                          FALSE
socket                            (No default value)
sleep                             0
user                              root
verbose                           FALSE
vertical                          FALSE
connect_timeout                   43200
shutdown_timeout                  3600

Default options are read from the following files in the given order:
C:\WINDOWS\my.ini C:\my.cnf
The following groups are read: mysqladmin client
The following options may be given as the first argument:
--print-defaults        Print the program argument list and exit
--no-defaults           Don't read default options from any options file
--defaults-file=#       Only read default options from the given file #
--defaults-extra-file=# Read this file after the global files are read

Where command is a one or more of: (Commands may be shortened)
  create databasename   Create a new database
  drop databasename     Delete a database and all its tables
  extended-status       Gives an extended status message from the server
  flush-hosts           Flush all cached hosts
  flush-logs            Flush all logs
  flush-status          Clear status variables
  flush-tables          Flush all tables
  flush-threads         Flush the thread cache
  flush-privileges      Reload grant tables (same as reload)
  kill id,id,...        Kill mysql threads
  password new-password Change old password to new-password
  ping                  Check if mysqld is alive
  processlist           Show list of active threads in server
  reload                Reload grant tables
  refresh               Flush all tables and close and open logfiles
  shutdown              Take server down
  status                Gives a short status message from the server
  start-slave           Start slave
  stop-slave            Stop slave
  variables             Prints variables available
  version               Get version info from server

C:\>flush-privileges password "root" 

'flush-privileges' is not recognized as an internal or external command,
operable program or batch file.

 C:\>c:\mysql\bin\mysqladmin -u root flush-privileges password "newpwd" 

 c:\mysql\bin\mysqladmin: connect to server at 'localhost' failed
error: 'Access denied for user: 'root@localhost' (Using password: NO)' 

<!-- Program Name:  mysql_send.php
     Description: PHP program that sends an SQL query to the 
                  MySQL server and displays the results.
-->
<html>
<head>
<title>SQL Query Sender</title>
</head>
<body>
<br />
<b>Warning</b>:  mysql_connect(): Access denied for user: 'root@localhost' (Using password: NO) in <b>C:\Server\htdocs\test\MySQL_Send.php</b> on line <b>18</b><br />
Database Selected: <b>localhost</b><br>

          Query: <b>CREATE DATABASE Test123</b>
          <h3>Results</h3>
          <hr><b>Error 1044: Access denied for user: '@localhost' to database 'Test123'</b><hr><br>
         <form action=/test/MySQL_Send.php method=post>
          <input type=hidden name=query value="CREATE DATABASE Test123">
          <input type=hidden name=database value=localhost>
          <input type=submit name="queryButton" value="New Query">

          <input type=submit name="queryButton" value="Edit Query">
         </form>