windows 7 security mechanisms

[her]

Hey guys i want to know what is the basic security mechanism w7 have and why is better that the one of xp and vista...And can w7 can protect your computer from dos attacks,man in the middle attacks etc??i'm really really curious about it

 

[I be he]

Everytime ive been infected, its been my clicking finger which seems to be able to bypass all of xp's,Vista's, 7's built in security.:shock: Thank God for Sandboxie, Returnil, Geswall, Comodo D+

 

[her]

i have anassignmnt about windows built in security...if someone can link me with some info its very veryimportant for me