I assume your running Windows XP. If you have an Administrator account, it doesn't have a password by default. If you can log in as that, you can change your other user's password going to Control Panel/User. Select the account and select change password.

If you don't have an admin account, shut down and restart. While the computer is booting, press F8 to enter the Boot menu and boot in safe mode. Select Run from the start menu and type control userpasswords2. Select the account and select reset option. Type a new password into new password and confirm and your done.

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if u cant even get into windows then try this.

1-st easy road on the log on screen pres ALT-CTRL-DEL and on the classic logon that will apear trype Administrator on the user and blank pass

if u have the built in admin enabled and did not set passw to it when installing it will boot nicely and then u can change ur users pass in the controll panel users menu.

2-nd road simply get from someone or download from someone Hirens boot cd and when booting from hirens u will find among its tools the reset passw tool witch will let u reset any users pass in ur pc to blank .works on any pc on any user and will solve this problem 100%

I get computers donated to me which I rework and give

to folks who can not normally afford one.

Some of these have passwords unknown to me. There is

usually a shorting plug somewhere on the logic board

that lets you clear all passwords. It is usually labeled.

Sometimes you get lucky and there is a diagram inside

the case that shows where everything is.

I have had great success with Ophcrack when trying to recover lost passwords, works on XP,Vista and 7. It can be found here.

Turn on the computer and press F8 after the dell screen

boot into safe mode and click on the Admin account(has no passwords unless you added one yourself)

go to start, control panel and find "add or remove accounts" or "user accounts"

Find your account and click on it, click remove password and restart

Repeat the password removal steps to make a new password

This does not work in Vista/7 tough

There are many password reset tools out there which can help you unlock your computer when you forgot Windows password.

What's the operating system of your computer? If it's Windows 7, you can find a detailed tutorial at YouTube:

http://www.youtube.com/watch?v=Wg5F-pdTP...