What are the steps I should do to make shadow copy at windows 7 ?

Configuration settings for shadow copy can be found in System Properties. Navigate to the Control Panel and click the System Properties icon,

In the System Properties window, click the System Protection link on the left-hand side of the screen. 

Once you get to the System Properties dialog window, click the System Protection tab to reach the configuration screen for shadow copy . Make sure to check the drives for which you would like shadow copy to be available. If you want, you can create a restore point immediately by clicking the Create button. Under normal conditions, a new restore point is created as part of the shutdown/boot process.

You can also restore to a previous point from this screen if you want to and if a restore point exists. Click OK when your configuration is complete.

Control Panel -> System -> System Protection -> Turn On System Protection of Which Drive you want ( by Default Only OS Drive (C) is on). 

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