The answer depends some on WHY your computer will not let you in. If you are just locked out because you entered your password wrong too many times or because you forgot your password, there are two possible solutions. The best is to go into an administrator account and reset the user account. If you do not have administrator rights on your computer, you will have to go to someone who does in order to do the reset. The alternative is to get some software that is designed to allow recovering or resetting passwords. Some good ones that you can get for free for Windows systems are:
Apple includes a Reset Password utility on the Mac OS X Install DVD that shipped with the computer. You may also be able to do a reset on Mac OS 9 systems using the install disk for that OS.
I have also attached a link to an explanation of a way to reset the root password on a Linux system.
take it to the local repair shop to see whats wrong with it.
you smash it
my laptop ask me pin cod what i can do answer for me plies
you have to register to get in to tumbler
it wont let you make an account
report the account
Try pressing new then try inbox or restart your laptop/computer and start again if that doesnt work then you might have to make a whole new account!
Take the battery out and let it cool down
Reinstall the program.
no they wont Apple will let you use an iTunes account to purchase items from their iTunes store.
banana farts.
well it wont let me make one
Swanky downloads a bug to your computer
If your year of birth is above 1994, it wont let you make an account