Merge pull request #134 from AgoraIO/dev/win-readme

modify windows readme

Author: xia ning

windows/README.md

@@ -35,6 +35,10 @@ To build and run the sample application, get an App ID:
 
 You can directly run `APIExample/installThirdParty.bat` to automatically environment configuration.Once the configuration is complete, open the project with VS2017, select the x86 version to compile and run.
 
+**Note:**
+
+If execute ps1 script error, maybe powershell version is too low. We suggest update powershell.
+
 ## Basic Scene
 
 

windows/README.zh.md

@@ -41,6 +41,10 @@
 
 你可以通过直接运行`APIExample/installThirdParty.bat`来自动进行依赖下载与环境配置。配置完成后使用vs2017打开项目，选择x86版本进行编译就可以运行了。 
 
+**注解:**
+
+如果执行ps1脚本报错，可能是由于powershell版本过低造成，建议升级powershell
+
 ## 基础场景
 
 ### 直播互动