The latex installation packages and LaTeX Error: File '' xxx.sty '' not Found error

1. find the missing packages,

2 . Obtain the missing packages, packages address .

3.Download 

4.

4.1 into the installation path after unpack. (Eg: D: \ 01soft \ CTEX \ MiKTeX \ TEX \ LaTeX)
4.2 .win7 lower left corner of the search box to enter Setting (Admin), reflesh, Yes
4.3 run .ins file can be obtained. .sty document
4.4 repeat steps 3

5. Open winedt rerun