Many clients have asked us whether it is worth upgrading to Windows 7 from XP or Vista.  We are very impressed with Windows 7.    It has run all our software applications without a hitch.  Some errant older applications have been reported to have some compatibility issues with Windows 7.  For that reason Microsoft has provided free of charge a solution called XP Mode.  It is available from the Microsoft web site for users of Windows 7 Professional or higher.  XP mode can be found at the following URL,  http://www.microsoft.com/virtualpc.