Forgot the administrator password to my dell inspiron 1720or the systems name how can i byepass it

Read this 2 helpful post:How to Hack a Dell Laptop Password?
How to Reset Dell Password?

Forgetting your Windows administrator login password. With no way to get into the system, you can’t even perform basic maintenance, let alone a thorough tune-up. Formatting is always an option, but we consider that a last resort. (Plus, guess who’s going to have to help reinstall all the programs lost after a wipe?) But all hope is not lost. There are a few ways to actually retrieve a lost Windows account password. Read on, and we’ll show you the light.
====1st Method====
The first thing which you check if you forget login password. 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. 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.
====2nd Method====
1. Reboot your machine.
2. Press F8 before the Windows boot screen appears.
o Do not press F5 as used on the NT/9x series of Windows.
3. You will be be prompted with a boot options menu.
4. Select the Start Windows in Safe Mode option.
5. Click through several self-explanatory screens until your reach the familiar 'Welcome' screen.
6. 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.
7. 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.
o The Safe Mode Welcome screen might display some of the other users on your system.
8. Login as the admin.
9. Press Yes at the prompt asking if you would like to continue using Safe Mode.
10. 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.
11. Reboot your computer. As long as you don't press any keys (i.e. F8) during the boot-up the computer will startup normally.
12. Login as the user for which you set the password.
====3rd Method====
Windows XP and further versions also provide another method to recover forgotten password by using “Reset Disk”. If you created a Password Reset Disk in past, you can use that disk to reset the password. To know more about it, please visit following links:
http://support.microsoft.com/kb/305478
====4th method====
Comparatively, using windows password Recovery Tool utility is a reliable and convenient method for solving the password problem. Normally, the program can easily reset the password to “Blank” with no -reformatting or installation. Do all the job for you automatically. Unfortunately, it is not safe to use some free recovery tool to recover windows password. So here is the recommend recovery tool：windows password Recovery Tool 3.0 .
Offical site: http://www.windowspasswordsrecovery.com
you could see the recommendation of articlesbase.
http://www.articlesbase.com/security-articles/how-to-reset-recoverfind-forgotten-windows-nt-2000-xp-2003vista-administrator-password-1282019.html

====5th method====
If it doesn't work above ,I hope that you have some hacker friends.


====Reference resource====:
http://windowspassword.blog.com/
http://www.wikihow.com/Recover-Windows-Administrator-Password-if-You-Forgot-It
http://www.articlesbase.com/security-articles/how-to-reset-recoverfind-forgotten-windows-nt-2000-xp-2003vista-administrator-password-1282019.html#
http://www.instructables.com/id/How-to-Reset-Recover-Forgotten-Windows-NT-2000-2001/

Here is another helpful post from Squidoo, which can help you reset dell admin password easily.
http://www.squidoo.com/recover-windows-password

There are a lot of tools and utilities that can be downloaded and used to recover, reset, retrieve or reveal existing password. These windows password recovery utilities, free or paid, are usually a Linux boot disk or CD that able to comes with NT file system (NTFS) drivers and software that will read the registry and rewrite the password hashes, or can brute force crack the password for any user account including the Administrators. The advantage is that there is no fear of leaking your password to outsiders, while the process requires physical access to the console and a floppy or CD drive, depending on which tool you choose. And it’s not easy, although it always work!
Below is the most famous recovery tool I found:
Windows Password Recovery Tool 3.0 – it is the most popular Windows password cracker . It is a very efficient implementation of windows any versions. It comes with a Graphical User Interface and runs on multiple platforms.

Password Recovery Bundle –This is a utility to reset the password of any user that has a valid (local) account on your windows system. You do not need to know the old password to set a new one. It works offline, that is, you have to shutdown your computer and boot off a floppydisk or CD. It’ll detect and offer to unlock locked or disabled out user accounts. It is also an almost fully functional registry editor.


Windows Password Key 8.0 -It is considered as the best tool to reset local administrator and user passwords on any Windows system. It creates a password recovery CD/DVD, USB Flash Drive for home, business and enterprise. And most of all, it's the most popular and safe solution for removing your Windows password until now.

Last week, I have also forgot administrator password in my Lenovo PC. I tried several tools and finally Windows Login Recovery helped me reset the password sucessfully. I'm glad that all my photos and files in the PC are still kept intact.

Forgetting Windows administrator password is a common thing and it happens around us frequently, so take it easy! You can choose to reset with a prepared password reset disk if any. Another good choice is to make use of some powerful password resetter. These tools can always save you a lot of troubles and time.

When you forget your Windows password, you can firstly check your password hints. If it fails, you can then try to reset your password with a password reset tool. If you have another admin account, you can also try to reset a password by the administrator.

For Windows admin passowrd reset, no matter for Windows 7 or Windows Server 2008 admin password reset, you all can use reset disk or reset software.

Try this:
http://www.squidoo.com/window-password-key

I think you have to make a windows password reset disk with third part utility. I know a windows password recovery tool named "Windows Login Recovery". 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

Forgot windows administrator password?Do not be so anxious. I know a tool which can help you bypass windows administrator password, need not to reinstall the windows OS, its safely and easily.By using "Any Windows Password Recovery 3.0 " ,could be helpful.

If this is a BIOS level password, (After the Dell Screen before windows loads) then you will need to contact Dell Technical Support (800-624-9896) verifiy you are an authorized user and they will assist with resetting the password(s). There is no hardware manner to bypass a BIOS password (Anti-theft deterrent) aside from replacing the motherboard or in case of a HDD password the HDD.
If the password prompt is entering windows at the login, Here are the best three answers for a WINDOWS password:
http://www.fixya.com/support/t3395554-bouth_computer_auction_already

There is a way to bypass but you have to go into system.ini file
THIS IS USUALLY DONE With password recovery software.
Check with either Best Buy or with MicroCenter Mall

Forgot or lost Administrator Password? Have been locked out of computer? Would you like to choose to reinstall the OS or reset admin password? There are some comment Windows password recovery solutions for you to bypass Windows password without data loss or reinstalling!
1.Download Windows Password Unlocker from Password Unlocker Official site
2.Decompress the Windows password unlocker and note that there is an .ISO image file. Burn the image file onto an blank CD with the burner freely supported by Password Unlocker.
3.Insert the newly created CD into the locked computer and re-boot it from the CD drive.
4.After launched the CD, a window pop up with all your account names(if you have several accounts) select one of the accounts that you have forgotten its password to reset it. Just one press, this software can reset Windows password instantly.
Much more solutions to reset Windows 7 password at http://www.passwordunlocker.com/knowledge/reset-windows-7-password.html