How do I reset administartor passwod on a Dell system GX280

The wise man will choose windows password reset tool to reset windows password

For free tool, try the Ophcrack, but it would require some computer skills.
While for some affordable tool, Windows Password Reset would be the most suitable tool for you, it is even simple to use for the new beginners.

Here are the simple guide:
Step 1: Download Windows Password Reset Deluxe from http://www.windowspasswordreset.net and install it in any available computer
Step 2: Burn a bootable CD/DVD or USB flash drive
Step 3: BIOS settings of your locked computer to make it boot from CD/DVD or USB flash drive
Step 4: Reset Windows password successfully

Choose the most suitable tool for yourself. Good Luck.

Here is the step to Clear Password

1. Turn off the computer and disconnect the power cable from electrical outlet.
2. Remove the computer cover.
3. Locate the 2-pin password jumper (PSWD) on the system board, and remove the jumper to clear the password.
4. Close the computer cover.
5. Connect your computer and monitor to electrical outlets, and turn them on.
6. After the Microsoft® Windows® desktop appears on your computer, shut down your computer.
7. Turn off the monitor and disconnect it from the electrical outlet.
8. Disconnect the computer power cable from the electrical outlet, and press the power button to ground the system board.
9. Open the computer cover.
10. Locate the 2-pin password jumper on the system board and attach the jumper to reenable the password feature.
11. Replace the computer cover.
12. Connect your computer and devices to electrical outlets, and turn them on.
13. Assign a new system and/or admin password.
14. **NOTE** This procedure enables the password feature. When you enter system setup, both system and admin password options appear as Not Enabled-meaning that the password feature is enabled but no password is assigned.
15. Clearing CMOS Settings
16. Turn off the computer and disconnect the power cable from electrical outlet.
17. Remove the computer cover.
18. Reset the current CMOS settings:
19. Locate the password (PSWD) and CMOS (RTC_RST) jumpers on the system board.
20. The jumper locations on the small form-factor, small desktop and small mini-tower computers are shown in the preceding section.
21. Remove the jumper plug from its pins.
22. Place the password jumper plug on the RTC_RST pins and wait approximately 5 seconds.
23. Remove the jumper plug from the RTC_RST pins and place it back on the password pins.
24. Close the computer cover.
25. Attach the computer stand, if used.
26. Connect your computer and devices to electrical outlets, and turn them on.

Method 1: Use a password reset disk
To log on to the computer by using a password reset disk, follow these steps. If your computer is or was a member of a domain, go to the "Windows XP Professional in a domain" section and follow those steps.

Method 2. Password Recovery Bundle is a must-have toolkit to recover/remove/reset passwords.
You can view the article to read more.
Hope can help u

When you are booting up your computer, you need to press F8 in order to get into the per-windows start-up.

Once you are in this stage, you will need to boot your computer into safe mode. This will give you access to the basic programs of Windows XP.

Once you have booted into safe mode. You will have to access the administrator account and create a new account or you can reset your admins password from this location.

Click start control panel Open User Accounts in Control Panel. On the Users tab, click the name of the user whose password you want to change, and then click Reset Password. In New password and Confirm new password, type the new password, and then click OK. Notes You can change passwords only for local computer accounts, such as guest, administrator, or accounts you create for your computer. You cannot change your network logon password in User Accounts. To change your own password, press CTRL ALT DELETE and then click Change Password
also

When you boot up to the log in screen type in administrator as user to log in if you cant log in

during the boot up process you will see on the screen for a short amount of time press a certain key to enter set up

Press and hold that key during the boot up process to enter BIOS scroll down to set user password or supervisor password you can change or remove your password from there

also

click start control panel user accounts

on the users tab,click the name of the computer administrator you can change the password there

hope this helps

If you are referring to a system password, and not the windows password (IE - power on password) it is reset by the password jumper (25) near the power connector.