Logon problems in windows 7 pro x64

Have tried to find any with the similar problem on the net, but with no success,
hope that maybe someone can help me here in sevenforums.
When i boot up the laptop everything works normal and the page for
typing the password appears, when typing the password and hit enter nothing
happens !, the password typed disappear and him are ready again for a password.
In safe mode everything works as normal, logon, edit/changes in user accounts etc..
Will appreciate any help ! :).

Hi! Thank you for the respond.
Im sorry to say that it did not work out, tried to use the clean boot.
Nothing change, same as before when restart and try to logon in normal mode!.

Hi again!

Have tried now exactly what you suggested and created the new administrator account
without any password. When start up again in normal mode the same problem occurs,
he stop on the logon page and wait for the password, if you write something and press
return nothing happens like before. The account for the password has changed to the new
name, but still have the same problem .

Hi again! Both things you suggest now i have allready tried (used Norton power eraser), seems like nothing works !, can the win file/system for logon be damaged or corrupt ?.

Hi again! The system restore was turned off on this computer, have tried to find an restore point, it dont have. When i think back and a day before the problem occur, i tried the windows disk cleanup for the first time, also with the register cleanup, maybe its this that have made the problem?.