Update install_Windows_en.md (#790)

* Update install_Windows_en.md

* Update install_Windows_en.md

doc/fluid/beginners_guide/install/install_Windows_en.md

@@ -9,9 +9,8 @@ This instruction will show you how to install PaddlePaddle on Windows.  The foll
 
 **Note** : 
 
-* The current version does not support NCCL, distributed training, AVX, warpctc and MKL related functions.
+* The current version does not support NCCL, distributed training related functions.
 
-* Currently, only PaddlePaddle for CPU is supported on Windows.
 
 
 
@@ -30,8 +29,11 @@ Version of pip or pip3 should be equal to or above 9.0.1 .
 
 * Install PaddlePaddle
 
+* ***CPU version of PaddlePaddle***:
 Execute `pip install paddlepaddle` or `pip3 install paddlepaddle` to download and install PaddlePaddle.
 
+* ***GPU version of PaddlePaddle***:
+Execute `pip install paddlepaddle-gpu`(python2.7) or `pip3 install paddlepaddle-gpu`(python3.x) to download and install PaddlePaddle.
  
 ## ***Verify installation***
 
@@ -39,5 +41,8 @@ After completing the installation, you can use `python` or `python3` to enter th
 
 ## ***How to uninstall***
 
+* ***CPU version of PaddlePaddle***:
 Use the following command to uninstall PaddlePaddle : `pip uninstallpaddlepaddle `or `pip3 uninstall paddlepaddle`
 
+* ***GPU version of PaddlePaddle***:
+Use the following command to uninstall PaddlePaddle : `pip uninstall paddlepaddle-gpu` or `pip3 uninstall paddlepaddle-gpu`