ptsnoop.exe could be a legitimate process used by WinModems of various manufacturers that enable functionality by looking for an open COM port when the modem is activated. ptsnoop.exe could be a legitimate process used by Snooper (Karen Kenworthy) that enables the user to create a log file (snoop.log) of all program activity. CAUTION: Various trojan/worm/spyware overwrite or create a file by this name.