There are a number of reasons why SpyFalcon is returning. Firstly it could be because the security on your computer is not high enough for surfing nowadays. Without sufficient protection you leave yourself wide open to infection. Secondly you might not be removing the program properly and it just stays on your computer.
Firstly, please read the selfhelp instructions which can be found here
. Please use those instructions as a guide to removing SpyFalcon from your computer. If you are not happy doing it by yourself and would like 1 to 1 help, or cannot remove the program using the self-help guide please reply and we can consider the options possible.