You want to know something about shadow copies
You want to know what shadow copies are.
Windows Vista (except the Home edition) is saving so called "shadowcopies" of the database to the harddisk. With this feature it is possible to access and older version of a file or a folder and not just the up to date version. To acces an older version just rightclick on the file or folder and select "Restore previous versions" from the properties. You can preview the each file and the restore the desired version. The file or folder is then restored to the original location.
Note: Only incremental changes are saved to the files or folder, therefore the required harddisk space is minimal.
About the Author
Wim Peeters is electronics engineer with an additional master in IT and over 30 years of experience including time spent in support, development, consulting, training and database administration. Wim has worked with SQL Server since version 6.5. He has developed in C/C++, Java and C# on Windows and Linux in different European countries and different European languages. He writes knowledge base articles to solve IT problems and publishes them on the Lubby Knowledge Platform where he is one of the most important contributors and the main developer.