i have windows xp. my admin login or password is not working

If you can get on to any of the admin accounts open command prompt via start run cmd.

once cmd is open type this net user Administrator newpasswordhere

That will change the user Administrator's password to newpasswordhere.

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To avoid reinstalling your system, the easiest way to resolve the problem is to use some Windows password Recovery program. The program will enable you to reset the password to "Blank" with no -reformatting or installation. Do all the job for you automatically. http://www.windowspasswordsrecovery.com/.
Windows Password Recovery Tool 3.0 allows you to reset windows password with with CD!!

I think the best way for you is to reset your windows password. The Windows password Reset
can solve all your problem within a few minutes. Importantly,No need to call a technician, no need to re-install anything, and you certainly don't need to reformat. windows password recovery tool: http://www.resetwindowspassword.com/

Forgot or lost Windows password? reset Windows 7 password with Password Unlocker Bundle, one of whose functions is to recover windows password for Windows NT 4.0, Windows 2000, Windows XP, Windows 2003 Server, Windows Vista, Windows 7. ect. This password recovery Bundle is based on friendly GUI, even a computer novice can control the whole process freely. Besides, password unlocker bundle saves a lot trouble. It helps to create a windows password reset CD, with which, you can remove the admin password even you have logged out the computer, yet no reinstalling, no data loss!
http://www.passwordunlocker.com

try do another windows if u cant do all this it will be easier for u

I ever used a windows password recovery tool to reset windows xp password to blank,its easily and safely to use ,not need to reinstall windows OS and with no data losing.you can have a try.
The reference link to windows password recovery soft: http://www.anypasswordrecovery.com/downl...

I think you have to make a windows password reset disk with third part utility. Burn a boot CD with the program, and insert it into the problem computer and your password will be reset to “Blank”, without losing any data and you needn't reinstall windows OS. You can download it from http://www.windowsloginrecovery.com

This sounds pretty interesting. We used a similar software at my tech support job a few years ago. Called "Windows Password Key 8.0".
It works very prefect to regain your password .Also use boot CD/DVD.
I have download it from this website: http://sn.im/bypasswindowspassword

Vista?
Here is a solution, you can try it.
http://windowspassword.blogspot.com

or you can try some password recovery tools ,I used one called Any windows password reset 7 . It successfully set my vista password to blank in minutes. I download it from
http://www.windowspasswordreset.net

I know a Windows password recovery which can easily reset Windows passwords, including Windows administrator password and user passwords, get it to manage your passwords.
http://www.anypasswordrecovery.com/suppo...

Password Recovery Bundle is a must-have toolkit to recover/remove/reset passwords for Windows, Excel, Word, Access, PowerPoint, Outlook, Outlook Express, PDF, RAR/WinRAR, ZIP/WinZIP, MSN, AOL, Google Talk, Paltalk, Trillian, Miranda, Opera, Firefox and IE Browser, etc. Over 21 types of passwords can be Recovered instantly. Until now, these password recovery tools are the fastest on the market, the easiest to use and the least expensive..

http://www.recoverlostpassword.com/produ...

Can't remember your windows xp admin password?Windows password key 8.0 has a neat trick that will get you back in.This method is easy for everyone to follow.
Download the utility from http://www.lostwindowspassword.com and install it then burn the software to a CD/USB drive,then insert the newly created CD/USB drive to your locked pc and reboot your computer,then press "F2" to enter your BIOS setup,following the instruction to reset your lost windows password.

I'd like to create a Windows Password Reset Disk for password reset, the tool Windows Password Breaker http://www.recoverwindowspassword.com/ can help you create one which can easily and safely reset the lost Windows password.

You can remove the password with some windows password recovery software like Windows Passowrd Recovery Basic.
http://www.windowspasswordrecovery.net/w...

Password Recovery Bundle is a must-have toolkit to recover/remove/reset passwords for Windows, Excel, Word, Access, PowerPoint, Outlook, Outlook Express, PDF, RAR/WinRAR, ZIP/WinZIP, MSN, AOL, Google Talk, Paltalk, Trillian, Miranda, Opera, Firefox and IE Browser, etc. Over 21 types of passwords can be Recovered instantly. Until now, these password recovery tools are the fastest on the market, the easiest to use and the least expensive..
http://www.lost-password.net/products/pa...

Hey, guys, I want to recommend you a PC cleaner, the software "tuneup360". It's very easy to handle and of course very powerful, you can have try, I'm sure it can improve your computer performance.

If you've forgotten your Windows password and you're on a domain, you should contact your system administrator to reset your password. If you're not on a domain, you can reset your password by using a password reset disk or by using an administrator account.
If you forget the administrator password and don't have a password reset disk or another administrator account, you won't be able to reset the password. If there are no other user accounts on the computer, you won't be able to log on to Windows and will need to re-install Windows.
If you do not want to re-install your windows system, then follow this tutorial to reset a forgotten windowsvistapassword:
Source(s):http://www.passwordseeker.com

Lost windows password is not a big problem .I realize an easy method to reset lost windows password, just need to produce a windows password reset bootable CD/DVD or USB flash drive to reset forgotten windows password,I have made a bootable USB flash generate using the tool Windows Password Seeker and reset my administrator password successfully.More information in Lost windows password is not a big problem .I realize an easy method to reset lost windows password, just need to produce a windows password reset bootable CD/DVD or USB flash drive to reset forgotten windows password,I have made a bootable USB flash generate using the tool Windows Password Seeker and reset my administrator password successfully.More information in http://bit.ly/owPQ4m

I suggest you do not reinstall your Windows XP or take it to an computer expert for repair, it may cost you some time or result in losing data, or cost some money.

You can totally reset the password by yourself by creating a bootable cd with these Windows password recovery tool, such as Windows Password Recovery Tool 3.0 , Ophcrack, Windows Password Key .

Please see: http://answers.yahoo.com/question/index?...

There is a detailed instruction. It may help you a lot.

If you forgot your windows xp password, you can download a software at http://reset-windows-password.com Last week I lost my windows xp password. At last, I found it and reset my windows password successfully.

1.Use the built-in administrator account which you can logon without password in safe mode.It was built when you install your system and its password default as blank.Press ctrl+alt+delete twice in the welcome screen and you can see a classical logon dialog box,type administrator and press Enter.Or you can press F8 when you start/restart your computer to select start from safe mode.

2.Use a password reset disk If you have created ever.Of course it must be created for your current password.You can find a prompt when you input a false password in the welcome screen.Clik it and follow the guide.

3.If the two methods above cannot help you,you can find a recovery tool.As far as I know, there are many password tools on the network, but I have used is "Windows password rescuer professional 3.0" ,it is simple and safe that the average person will use it. It can soon reset the password in several minutes.Only four steps can help you reset the lost Windows password:
Step 1: Download Windows Password Rescuer and install it to another computer.
Step 2: Run it and burn it to a bootable CD/DVD or USB flash drive.Before this confirm that you have insert a CD/DVD or USB.
Step 3: BIOS setting:Setup your own computer boot from CD or USB.Press F2 or DELETE when you start/restart your PC to get into the BIOS SETUP list.Use arrow keys to select boot manu,and use +/- key to move the CD/DVD or USB option to the first site.Then inset the CD/DVD or USB you have just created. Press F10 to save and exit.
Step 4: Reset Windows password: Wait for a moment,it will display friendly operate window,and you can reset whichever password on it.More detailed instruction refer to this article:http://www.daossoft.com/documents/how-to...

There is an easy and safe method to reset windows password I have tried.
Follow the instructions below.
1. Download Windows Password Reset 9.0
2. Burn it to a disk or USB flash drive to create the boot disk
3.Configure your pc or laptop to boot from the CD/DVD Rom or USB port
4. Boot the locked computer and remove Windows password
http://www.reset-windows-password.com/ho...

Several days ago, I forgot my windows vista administrator password. I solved my problem with the help of Windows Password Seeker. Not only work on XP/Vista/2000/NT, but also compatible with windows 7, I tested it on my pc installed with Windows 7 and remove the local user and admin accounts password successfully. It’s worth a try. You can download it from: http://www.passwordseeker.com/howtouse.h...

At one time I forgot windows password. And then, I downloaded a file and created a windows password reset disk with a program named Windows Password Reset 9.0 and I successfully reset the forgotten password with the disk. http://www.reset-windows-password.com/re...

Hey, friends. If you forgot windows password, I know a powerful tool that may be can help you. Anmosoft Windows password reset is an easy-to-use yet powerful Windows password recovery program, it can help you to reset Windows password what you have forgot easily and quickly. The important thing is that your data in the computer will not have any change.
http://www.resetwindowspassword.com/

Don't worry about it,that is easy to slove.Windows Password Killer is professional password recovery software ,it can bypass windows pasword and remove your password.the program even supports change any local admin/user/domain admin password, and create a new Administrator account via CD/DVD or USB drive. I hope it can help you!
http://www.windowspasswordkiller.com/res...

Don't worry about it. Windows Password Rescuer can help reset Windows 7/vista/xp password instantly.
http://www.daossoft.com/knowledge/reset-...

Go through with these steps and get Windows xp password recovery with ease!
Step 1. Download Windows Login Recovery Professional and install it in any computer.
Step 2. Run the program and burn an ISO image file into a blank CD/DVD or USB flash drive.
Step 3. Start your locked computer from the bootable CD/DVD or USB flash drive.
Step 4. bypass Windows password successfully.

http://www.windowsloginrecovery.com/rese...

In consideration of remaining all programs and data of the computer,I recomend you to use a passowrd tool:Windows Password Rescuer.It supports all versions of windows operation system.Recover Windows password without lose anything.Here are the simple guide:
Step 1: Download Windows Password Rescuer Personal 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: Recovery Windows XP password successfully.
http://www.daossoft.com/documents/quick-...

I also met this problem ever, and I try some common methods just like safe mode, net user but in vain.Afterwards I found a password recovery tool calls Windows Password Rescuer that it helps me solve my problem.You also can use Windows Password Rescuer to add a new user with administrator privilege to your Windows when you can not find target user. With this New user account you can logon your locked computer directly to copy important data from the locked computer if you want to reinstall your Windows system at last.The usage is simple so that PC novice can use it, you can see this article:
http://www.forgot-windows-7-password.com...

I have bookmarked a tutorial titled:
Create XP Password Reset Disk | Do not need to worry about forgetting your password!
U can google search the title and get suggestion from:
http://www.windowspasswordsrecovery.com/...

There will be methods as following:

Tips 1: Use a Win XP recovery disk to reset password

Tips 2: Logon with the built-in Administrator account

Tips 3: Use another accounts with administrator rights

Tips 4: Reset Windows XP password with Windows Password Recovery tool 3.0

Tips 5: Burn a CD/DVD to recover lost Windows XP password

Hope it helps you!