Creating and applying System Restore point in Windows 7
As the experience of talking to users of Windows 7 showed, not everyone knows how to create and apply system restore point, present instruction is written for those people.
To create a restore point you need to open the systems properties panel - Control Panel → System and Security → System → System Protection → Create... in the dialog box enter the name of the point(date and time are automatically stamped), after the tool has done creating just press "Close" button.
In order to restore the system to the desired point in time, you must use another tool - the Control Panel → Recovery → Run the System Restore Wizard then click "Next" and in the list select the desired point, then again click "Next" and after making sure of selected item click "Finish".
The system will return to the desired point in time. In the same window, you can learn about what programs and drivers would be removed as a result of the recovery, and which ones will not be affected by the recovery.