Ok here we go i really hope i in right place!!!! some how i have set a password for my user account to log on to windows so now all i can do is log on as the guest user i can not really do anything to my computer because it say i have to be the main one! so what do i do to be able to get back in to my computer like i need to be?

Open command prompt. (Start > Run > cmd)

In it, type the following command:

net user YOUR_USERNAME NEW_PASSWORD

For example, we can say John wants to reset his password to moon123. He would enter the following:

net user John moon123

Now, if John wanted to clear the password from his account, he would enter the following:

net user John *

Hope this helps. :)

ok i did that and it says that access is denied that system 5 error has occured anything you know now? thank you for helping

Try the steps in this MSKB: http://support.microsoft.com/kb/321305