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By performing a bit-by-bit comparison of the backup medium with the originalsource data.
Windows XP provide " Windows Backup and Restore" a In build utility for creating backup. I will create backup of your vital files, documents, folders, songs, videos, and other data. this utility create .bkf backup files.
The files which store the copy of your original data are called backup files. In windows backup files are created by NTbackup utility and windows backup and restore utilities. These backup files have .bkf file extension.
Yes, you can. Backup your data. Insert the disk with windows 7 and follow instructions.
System State Data
You can't uninstall Windows XP, from the command line or otherwise.
ScanState
Yes. The Windows Backup and Restore Utility gives you the option to make a duplicate copy of all the data on your hard drive if you wish.
It's call System State Data
backing up information or data is where work is saved on your computer and on a memory stick so that if for any reason you lose your computer one day then you will still be able to get to that piece of paper
Try EasyRecover or Pandora Recovery if you didn't make a backup.
User State Migration Tool (USMT): A set of two command-line programs, Scanstate.exe and Loadstate.exe, that installers can use to save user profile data from an existing workstation and restore that data to a newly-installed computer running Windows 7. USMT performs basically the same tasks as the wizard-based Windows Easy Transfer tool, but because it runs from the command line, it can be integrated into scripts and task sequences.