Restoring a previous version of windows on a windows 7 pc using windows.old folder

At times you might want to restore a previous version of Windows, that you had installed before you installed Windows 7. This article explains just that. Windows.old folder is created when you install a new version of windows over an older version. It basically consists of all the data in the root of your partition which had windows installed,  before you installed Windows 7. It might be quiet large in size. So make sure that your windows par...