Hi there and welcome
It appears someone enabled the password ***** the computer.
Can you attempt this please.
turn off the computer
turn it on and keep tapping F8 until you get to a menu.
Choose Safe Mode.
This should get you into Windows in Safe Mode (you wont have internet but it is not needed for this).
Once in, click Start, and type in
Press enter and follow the onscreen instructions to perform a Restore from the last Restore point.
Once completed, tell me if you can now start into Windows normally please.
can you tell me please the make and model of the computer?