This is a worm type trojan that spreads around the internet virally .
It appears as a PrettyPark utility attached to email.
Being executed it installs itself into the system then sends infected messages

• 1. delete WINDOWS|SYSTEM|FILES32.VXD
  
• 2. Using REGEDIT, modify the registry entry
  GKEY-LOCAL-MACHINE\Software\Classes\
  exefiles\shell\open\command
  from FILES32.VXD "%1"%* to "%1"%*
  
• 3. Delete the pretty park.exe file
  
• 4. reboot the computer