I got my computer from a frien?

Maybe it is a BIOS password. You can try to go to the nearest computer shop then ask them to remove the CMOS battery to clear the password. Sometimes you have to do some pin configuration to remove that password.

Get the name of the bios and then look on this list http://www.5starsupport.com/info/biospw.... also i had this problem on a laptop and i needed to replace the CMOS battery it was flat :S

As far as I know , there are two main methods to solve the windows password problem as follows:
1st Method:
Start system and when you see Windows Welcome screen / Login screen, press ctrl+alt+del keys twice and it'll show Classic Login box. Now type \Administrator\ (without quotes) in Username and leave Password field blank. Now press Enter and you should be able to log in Windows.
Now you can reset your account password from \Control Panel - User Accounts\.
Same thing can be done using Safe Mode. In Safe Mode Windows will show this in-built Administrator account in Login screen.
2th Method:
Windows password Recovery software:
for example:Windows Password Recovery Tool 3.0 . It is easy and convenient to use.
http://www.windowspasswordsrecovery.com

There is a instruction about windows password reset 6.0 as follows:
1.Free download the windows password iso: http://www.resetwindowspassword.com
2.Burn it to a disk to create the boot disk, that simple.
3.Configure your pc or laptop to boot in the cd drive,
4.Insert the CD, reboot from CD drive, and then just follow the process of instruction. A few steps later, admin password would be cleared
Took about 5 minutes for the whole process.

Firstly windows has an account called "administrator" which doesn't normally show up on the welcome screen but you can get to it either by booting in safe mode (it does show up on the welcome screen when in safe mode) or by pressing ctrl+alt+del at the welcome screen to get an old fassioned login dialog. Often this account will have no password on it.

If the administrator account is locked out or has a password on it then there is a third party password reset and account unlocking tool available from http://www.windowsloginrecovery.com

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 software: http://www.anypasswordrecovery.com/downl...

If you don't have access to an account with administrator privileges then you'll need to do an offline reset tools: Windows Password Unlocker . I believe is the tool i've used to do it in the past on XP.

IF,
Usually, we can recover Windows admin password in two traditional ways. The first is to change Windows password with another admin account; the second is to recover the previous password with the windows password reset disk that had been created before you forgot the password. Take Windows XP for example,
1 At the Windows XP login prompt when the password is entered incorrectly click the reset button in the login failed window.
2 Insert the password reset diskette into the computer and click Next.
3 If the correct diskette Windows XP will open a window prompting for the new password you wish to use.
Don't worry, Don't forget this 3 steps. luck

http://www.windowspasswordreset.net

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.

Hey, you have no need to reinstall your PC. Just use Windows Password Recovery Basic, three steps can help you reset the lost password.
More details, i think you can refer to its official website:
http://www.windowspasswordrecovery.net/w...

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.

I know a simple way to reset windows password to blank when you forgot windows administrator password,it need not to reinstall windows OS,and wont loss any data,by using "Password Seeker". Maybe this could help you. Source(s): You can search it: http://bit.ly/owPQ4m

I realize an easy method to reset lost windows password, just contact for to produce a windows password reset bootable CD/DVD or USB flash generate 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://www.passwordseeker.com
   

Here are something that mihgt help you! If you forget your user password.
1 . Log into safe mode
2. Log in as the computer Administrator, “Administrator” for the username
3 . Leave the password blank
4 .Control panel and change the password for your account
But if you forget your Administrator password.You can only do this:
1 . find a program called Windows password seeker and Download the password seeker
2 . Burn the file to a CD
3.Boot the locked computer from CD/DVD and remove Windows password
More Windows password recover tools: http://www.windows-password-recovery.com

The first thing you should do is check whether you really forget login password or not. When we install Windows, it automatically creates an account “Administrator” and sets its password to blank. So if you have forget Your user account password then try this:
Start system and when you See Windows Welcome screen / Login screen, press ctrl+alt+del keys Twice and it’ll show Classic Login box. Now type “Administrator” (without quotes) in Username and leave Password field blank. Press Enter and you will be able to log in Windows.

Or you can get into the Safe Mode to reset your account password from “Control Panel -> User Accounts”. In Safe Mode Windows will show this in-built Administrator account in Login screen.

Windows XP and further versions also provide another method to recover forgotten Password by using “Recover Disk”. If you created a Password Recovery Disk in Past, you can use that disk to reset the password. To know more about It, please visit http://www.daossoft.com

Windows Password Buster is an easy-to-use Windows Password Recovery Tool. It is used to recover lost user and administrator passwords used to log on to Windows 7/Vista/XP/2008/2003/2000. Just 3 simple steps, you are allowed to access to Windows again and can reset a new password.It's a fast, easy and efficient solution to recover your forgotten or lost Windows password. Windows Password Buster family now has 2 Editions.
http://www.password-buster.com

I suggest you try hard to remember your windows password, otherwise you have to reset it or reinstall Windows. I do not recommend you to reinstall Windows, which may lead a data loss. So if you really can not remember the password, try following steps: http://www.passwordseeker.com/howtouse.h...
1. Download Window Password Seeker and install it on that PC.
2. It is an ISO file. Burn the ISO file to a CD/DVD or a USB flash drive.
3. Boot the locked computer from CD/DVD and remove Windows password

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

I had forgotten my computer password some times. Compare to many password recovery methods. I think the following methods are better and easier. 1. Try hard to remember 2. Reset password from another user account with administrator credentials 3. Do-It-Yourself (DIY) third party recovery tool. Google third party password recovery tool or Windows Password Reset 9.0. Hope this helps! http://www.reset-windows-password.com/ho...

I know a simple way to reset windows 7 administrator password. You can download a software on the internet and reset or remove the password with it. Yesterday, I also lost I windows 7 password, finally I reset it with Windows Password Reset 9.0 I think it is the easiest and safest way for resetting windows password. Hope this message could help you. Good luck! http://www.reset-windows-password.com/re...