Wont accept my password. ive tried rebooting and everything and still it says login error

As far as I know, there are several methods to be useful to you.
First, 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.
In addition,there is a much simpler and more practical method to recover forgotten Password by using password reset tools, Google third party password recovery tool or Windows password seeker. This method can help you save a lot of time and it's more safe. http://www.passwordseeker.com/howtouse.html

As you know, if reinstall the computer will lead to lose data. In order to avoid data loss, you can remove the password with windows 7 password reset tool. I found a good one at http://www.reset-windows-password.com/reset-windows-7-password.html last week, then downloaded it and used it to remove the lost windows 7 password within only few minutes.

For removing Windows Passwords in safety, I highly recommend windows password reset tools. Last week, and then I downloaded it and used it to remove the lost password successfully. You can download one from: http://www.reset-windows-password.com

If you lost or forgot Windows password, you can create a Windows password reset disk to reset your lost or forgotten Windows password, i have created one with the tool Windows Password Breaker and reset my administrator password successfully.

When you boot up to the log in screen type in administrator to log in once you have your computer running again you have to take control (administrator)control panel user accounts on the users tab,click the name of the computer administrator you can change the password there or if your computer has a system restore you can restore it to an earlier date which will have your personal settings

hope this helps