The Shuttle SH87R6 is a great foundation for a small yet powerful system using the latest in hardware. You can combine a Core i7-4770(K), a couple of SSDs and even a mid-range dual-slot graphics card, for example. It's perfect for bringing along to LAN parties, or you can make yourself a powerful yet tiny, portable PC.
There is a lot of free Microsoft software to be had, programs which enable better web surfing and help protect against spyware are just two types. PCSTATS Tips