I'm a beginner in penetration testing, and I'm struggling with finding decent material to learn. I used book about nmap, Metasploit, exploit writing etc..., but they contained too much information about too many OS's. I want something specific, something that can get me familiar with Windows exploitation systems, especially Windows 7.
I also noticed that security world is changing at a baffling speed, so I would like to stay in constant awareness with these changes. What are the most interesting sites/forums/social networks and such that you advice ?