I know it sounds stupid, but have you tried turning your computer completely off andback on, then running KHP again?
If that doesn't help, reinstall KHP.
If that doesn't help, tell us what version of Windows you are using. There is a way to restore to a prior date, before your daughter changed screen saver.
WARNING! Many screensavers have viruses or Trojan Horses embedded within them! 
1. If you don't have a virus scanner, get one IMMEDIATELY and run it on your computer.
2. If you don't have ZoneAlarm (zonealarm.com) home version (free) installed do so IMMEDIATELY.
3. Don't shoot your Daughter!!!!! However, establish some new rules of using the computer. She has no idea what she is installing, and I'd give you a 98% chance your problem is the ScreenSaver, and the virus or Trojan Horse it is now running.
What's a Trojan Horse 
It is a hidden program capable of sending everything on your computer hard drive to a web site script somewhere in the world; most often Russia!
EVERYTHING!
It is also capable of turning your computer into a wide open door for the person who controls that ScreenSaver with the THorse.
It is also capable of turning your computer into a distributed Denial Of Service (dDOS) attack computer that the person can aim and fiire against any web site in the world.
Understand now? I don't want to panic you, but don't connect to the Internet any more than you have to.
Get ZoneAlarm NOW... RIGHT NOW! ZoneAlarm.com.