You should delete this file without attempting to run it. PrettyPark.exe often arrives as a UUencoded attachment. If your mail program cannot handle UUencoded attachments, it will appear as a lot of gibberish in the body of the mail message. In this case, just delete the message and you will be all right. You can only become infected if you actually run the program.
Disinfection is tricky.
A detailed description of this virus is available on the DataFellows Web site . The Bubbleboy computer worm affects Outlook and Outlook Express users. It is the very first worm that is able to spread via email without opening an attachment. Bubbleboy can only spread under Microsoft Outlook 98, Outlook 2000 and the version of Outlook Express distributed with Internet Explorer 5. It is believed that Netscape and Eudora are not affected.