Before you begin this guide you’ll need the following:
- Internet Connection.
Step 1 — Install Chocolatey
Please follow the below steps in order to install Chocolatey on your windows 7 Machine.
- Open an administrative command prompt as an Administrator.
Note: If you not aware as how to open the command prompt as an Administrator,Please follow these steps.

- 
    Click on the Windows Icon  
- Right click on Windows Command Processor, Select and Click on Run as Administrator.
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    If User Account Control dialog opens Click Yes.  
Now you have opened command prompt successfully as an administrator.
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    Navigate to the URL: https://chocolatey.org/  
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    Click on Install.  
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    Click on More Options under More Install Options 

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    Click on the Copy Icon image next to Cmd.exe- @powershell -NoProfile -ExecutionPolicy Bypass -Command "iex ((New-Object System.Net.WebClient).DownloadString('https://chocolatey.org/install.ps1'))" && SET PATH=%PATH%;%ALLUSERSPROFILE%\chocolatey\binNote:It copies the code needed to invoke on command line. 
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    Switch back to command prompt.  
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    Paste the code which you just copied earlier. @powershell -NoProfile -ExecutionPolicy Bypass -Command "iex ((New-Object System.Net.WebClient).DownloadString('https://chocolatey.org/install.ps1'))" && SET PATH=%PATH%;%ALLUSERSPROFILE%\chocolatey\bin
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    Hit Enter on your keyboard.  
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    It downloads the Chocolatey and adds to the Windows Path system C:\ProgramData\chocolatey\bin and it is ready to use. 
Since chocolatey is installed in our machine.Let us try to Install CC Cleaner as a demo with the help of using chocolatey.
Follow these steps:
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    Navigate to https://chocolatey.org/packages  
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    From the search box search for CCleaner  At the time of writing this tutorial the latest version of CCleaner was 5.20.5668. You might see a new version now. 
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    Copy the code : choco install ccleaner
Do not copy C:> which is infront of the code.

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    Switch back to command prompt and paste the code which you just copied. 
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    Hit Enter.  Installation starts…  
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    Type Y and hit Enter.  
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    The install of ccleaner was successful message appears. 
Congratulations!