CNTK 2.0测试版7安装错误-install.ps1未进行数字签名

我下载了cntk 2.0测试版7。执行时。\install.ps1，未经数字签名的install.ps1出现此错误：

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PS C:>cd。\local\cntk\Scripts\install\windows\PS C:\local\cntk\Scripts\install\windows>。\install.ps1.\install.ps1：无法加载文件C:\local\cntk\Scripts\install\windows\install.ps1。文件C： \local\cntk\Scripts\install\windows\install.ps1未进行数字签名。您不能在当前系统有关运行脚本和设置执行策略的详细信息，请参阅上的about_execution_Policieshttp://go.microsoft.com/fwlink/?LinkID=135170.行：1字符：1+。\install.ps1+~~~~~~~~~~~~~+CategoryInfo:SecurityError:(：)[]，PSSecurityException+FullyQualifiedErrorId：未授权访问

并且如果我启动powershell-执行策略不受限制install.ps1可以运行，但没有安装任何东西，下面是输出：

This script will setup the CNTK prequisites and the CNTK Python environment onto the machine.
More help is given by calling 'get-help .install.ps1' in your powershell environment.
The script will analyse your machine and will determine which components are required.
The required components will be downloaded in [C:localcntkScriptsinstallwindowsInstallCache]
Repeated operation of this script will reuse already downloaded components.
- If required VS2012 Runtime and VS2013 Runtime will be installed
- If required MSMPI will be installed
- Anaconda3 will be installed into [C:localAnaconda3-4.1.1-Windows-x86_64]
- A CNTK-PY34 environment will be created or updated in [C:localAnaconda3-4.1.1-Windows-x86_64envs]
- CNTK will be installed or updated in the CNTK-PY34 environment

The parameter '-Execute' hasn't be supplied to the script.
The script will execute withouth making any actual changes to the machine.

1 - I agree and want to continue
Q - Quit the installation process
1
Determining Operations to perform. This will take a moment...
The following operations will be performed:
* Install Anaconda3-4.1.10
* Setup CNTK PythonEnvironment 3.4
* Setup/Update CNTK Wheel
* Create CNTKPY34 batch file
Do you want to continue? (y/n)
y
Performing download operations
Downloading [https://repo.continuum.io/archive/Anaconda3-4.1.1-Windows-x86_64.exe], please be patient....
** Running in DEMOMODE - no download performed
Download operations finished
Performing install operations
Installing Anaconda3-4.1.1. This will take several minutes. Please be patient ....
** Running in DEMOMODE - setting Exit Code **: 0
** Running in DEMOMODE - setting Exit Code **: 0
Setup/Update of CNTK Wheel environment. Please be patient....
** Running in DEMOMODE - setting Exit Code **: 0
Create-Batch [C:localcntkscriptscntkpy34.bat]:No-Execute flag. No file created
Install operations finished