Must include features:
Capture programs used
Capture websites in Internet Explorer/Firefox
Encrypted log file
Secretly email log files
Invisible Stealth Mode
Run silently at startup
Auto-capture at startup
License System (For Selling the Software)
Designed to market to parents keeping track of kids and suspicious spouses worried about cheaters, etc.
Also, the software must include a one hour demo for people who want to try the program before buying.