QUOTE(hujan86 @ Jun 8 2014, 22:58)

What, I can't shrink the partition any further!? A 458GB system partition is an overkill. I'm flipping out, man! I'm gonna flip some tables, man!
(╯°□°)╯︵ ┻━┻)
Fixed. Disabled the Hibernation file, swap file, page file, system restore and cleaned the Windows Update backup files then perform defragmentation (not quick defrag). Finally I could shrink the system partition further to 120GB.