I don't believe that is possible. You mean the Windows folder in C:\ ? That would mess everything up, because programs look to that directory for important libraries.
My Computer
At a glance
Windows 7 Professional x64Intel i7 2600K OC'd @ 4620 MHz16GB GSkill Sniper 2133 Mhz (4x4GB)EVGA GeForce GTX 480 SuperClocked+