Hi,

Thank you for posting in Microsoft Community.

I regret the inconvenience caused to you. Let me help you.

I suggest you to go through the below answers provided by Preeti Patel and check if it helps.

http://answers.microsoft.com/en-us/windows/forum/windows_10-update/windows-10-password-incorrect-error/582adf0a-e566-497b-a428-d6b49367116a

For further reference, click on http://windows.microsoft.com/en-US/windows-vista/Troubleshoot-Windows-password-problems

I hope the information helps. If you have any further queries, please feel free to contact us again. We will be happy to assist you accordingly.

Thank you.

Hi Aswin,

I have followed all possible steps that are available over internet but still with no solution and as far as Preeti Patal solution is I dont get CMD windows even when I am selecting safe mode with command prompt. All I get is "The password is incorrect. Try again.

This really a nasty problem, I have spend more then 4 hours trying to fix this issue.

So did this ever get resolved?  I have the exact same problem and have tried all your exact same internet solutions   This problem seems to be rampant and is inexcusable on Microsoft's part.  I can't imagine all the lost income from folks not being able to access their computers.    

Please give an update...thanks!

  Here, I copy text I've already placed, elsewhere:

  "Now the problem is happening to me, too.  I was apparently forced to upgrade from Windows 7 to 10, on ajn HP laptop.  For a few days, the thing SEEMED to boot.  Today,  now, it FIRST shows a screen with a beach, and when my mouse wheel brings down the other screen, I see my name, "Jim Bell", in large letters, as well as my direct email address in smaller letters below.  A box appears below that, saying "Password".  Problem is, I don't have a password,  I've never had a password.  So, I don't type anything, except hitting the "Enter" key.  "Please enter your sign-in information and try again".  But I have no "sign-in information" to provide.  Thus, I cannot log in.  I cannot use that computer.  The only reason I can access this is that I have a SECOND computer that isn't YET screwed up.  As far as I can tell, I am completely locked out of my computer. 

This is OBVIOUSLY a major problem with Microsoft and Windows 10.  Many other people have the same problem.  When I see other questions which seem to be related to the same problem, I often see the answerer suggesting that people do things, things that I cannot possibly do, in large part because I simply CANNOT log on to my computer.  I cannot EVEN BEGIN to solve the problem, because your brain-dead software DOES NOT ALLOW ME to do so.

Please note:  I did NOT "forget" my password(s).  I NEVER HAD such passwords, period.  It is clear from other questions here that this very serious bug doesn't occur simply because somebody "forgot" their password, but because there is a problem inherent with Windows 10.  It clearly wasn't debugged well.  I was happy with Windows 7.  I could tell that many or most people hated Windows 8.  SO I was smart and never tried Windows 8.  Little did I know that Windows 10 would be the disaster that it has become.