Simple File Sharing Missing In XP Pro

A friends computer was infected, after cleaning it I noticed under:

Tools - Folder Options - View - Advanced settings...

There is no option at the bottom for simple file sharing, it seems some malware removed the option.

Anyone know how I can add it back in? ( Guess I need to add back a reg. entry)

THANKS

P.S. My bad this is XP Home, my understanding is Home doesn't have this option, correct?

 

Correct; simple file sharing is always enabled in XP Home. Consequently, no such checkbox appears in Advanced Settings.

 

Thanks