I restored system settings to an earlier point before the problem
accured.
I didn't have the login problem, because i am only using one 1
account.
But i got a message when i logged in that said there was a problem with
system event notification service and that none-admin accounts were
unable to login.
every time i logged in to my account, the screen went black for 2
minutes, and when i tried to connect to internet i got an error message
that said "Windows Wireless is unable to start because of an issue with
an software." or something like that.
But after i restored system i didn't get any error messages. I can now
connect to internet, and the screen doesn't turn black for 2 minutes.
Problem fixed
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Rubenwn