The administrator password doesn't work for some reason, I don't know how to boot into safe mode with the hp g4 proliant machine? any advice?

Lost Windows password:

• Login as Administrator. Try with no password (load safe mode if you don't see Administrator). Press F8 during boot to access Safe Mode. XP only.
  
• Login as other user (if other user is available) and manage users. Must be an administrator.
  
• Reformat computer.
  
• Use 3rd party software to remove password. Like http://www.top-password.com/reset-windows-password.html
  
• There is a free boot CD called Hirens. This one command prompt only. http://www.hirensbootcd.org/ Just tested this one and works. Just follow the exact steps.
  

Lost Windows password:

• Login as Administrator. Try with no password (load safe mode if you don't see Administrator). Press F8 during boot to access Safe Mode.
  
• Login as other user (if other user is available) and manage users. Must be an administrator.
  
• Reformat computer.
  
• Use 3rd party software to remove password. Like http://www.top-password.com/reset-windows-password.html
  

Lost Windows password:

• Login as Administrator. Try with no password (load safe mode if you don't see Administrator). Press F8 during boot to access Safe Mode.
  
• Login as other user (if other user is available) and manage users. Must be an administrator.
  
• Reformat computer.
  
• Use 3rd party software to remove password. Like http://www.top-password.com/reset-windows-password.html
  

Lost Windows password:

• Login as Administrator. Try with no password (load safe mode if you don't see Administrator). Press F8 during boot to access Safe Mode.
  
• Login as other user (if other user is available) and manage users. Must be an administrator.
  
• Reformat computer.
  
• Use 3rd party software to remove password. Like http://www.top-password.com/reset-windows-password.html
  

Lost Windows password:

• Login as Administrator. Try with no password (load safe mode if you don't see Administrator). Press F8 during boot to access Safe Mode.
  
• Login as other user (if other user is availible) and manage users. Must be an administrator.
  
• Reformat computer.
  
• Use 3rd party software to remove password. Like http://www.top-password.com/reset-windows-password.html
  

Lost Windows password:

• Login as Administrator. Try with no password (load safe mode if you don't see Administrator). Press F8 during boot to access Safe Mode.
  
• Login as other user (if other user is availible) and manage users. Must be an administrator.
  
• Reformat computer.
  
• Use 3rd party software to remove password. Like http://www.top-password.com/reset-windows-password.html
  

Here is a simple way to access Windows XP with Administrator rights and privileges if you have password protected your User account on your Windows XP system and can't remember the password(s) to login. Whenever Windows XP is installed on a system, it creates a default account called "Administrator" and by default this account is not password protected. Therefore, if you bought a brand name computer (such as Dell, HP, Compaq or Sony)or you have installed Windows XP yourself. You should be able to login to the computer through the unprotected.

You can log on as an administrator to assign a new password to your account. To do this, try Method 1.

Method 1: Switch ON the PC, boot the PC in 'Safe Mode' by continuously tapping F8 button after you switch on until you get the Safe Mode Option.

Let windows boot in Safe Mode and log in to windows.

Click through several self-explanatory screens until your reach the familiar 'Welcome' screen.

Note that this welcome screen is limited to 256 colors and 640x480 resolution because the primary graphics will have been set to the Windows Safe Mode software VGA adapter. You will not be able to change this mode even in Display options, while Windows is running in Safe Mode.
Find the icon for the Administrator user. If the default settings of your system haven't been changed, there should be no password for this account.
Continue on to the User Settings control panel. Here you can change any of the other passwords for user on the machine. Make any changes you want.
Reboot your computer. As long as you don't press any keys (e.g. F8) during the boot-up the computer will startup normally.

As soon as the server turns on and you see a BIOS screen press the F8 key constantly. This should be you to the safe mode screen. If not then try another keyboard, or another USB slot.

If it is a hardware password, such as the motherboard, the there are two possibilities that I know.

1. Shutdown and unplug the power. Remove the battery on the motherboard wait 30-seconds and replace it.
2. There should be a CMOS reset jumper on the board. Typically, you move it over one pin, power on the board then power down and put it back to reset. Best bet is go to www.hp.com and check Support & Drivers for documentation on your ML350.

If this helps please vote for my solution.

Try safe mode boot, hit F8 or F5 fast in beginning of boot process. You may have to try this a few times to get timing just right.