Backing up and transferring data from an old computer system to a new one could be a challenged task. Before you start taking backup, make sure that Windows has a restore point created. Prioritize which files you back up and store on removable media. Technically you should backup the system registry, program and application files, operating systems and, if managing a network, the security settings for end users on first priority.
The system registry is very important to take backup, because the system registry contains information about the programs stored on the computer, including registration keys, software license keys and program access keys. The built-in Windows utility software or any third-party data protection program can be used to back up the registry.
Back up general files also at the time of replacing a computer, the files that are associated to applications are very important. If a program calls for a file on the new system and does not find it, the program will not run. Prioritize files for backup based on their usage: for example, Microsoft Excel files that a user accesses daily should have a high backup priority.
Backup the operating system to the recent restore point, in case there is a problem while restoring the operating system; the system restore can be used to recover from the issue.
When transferring applications to a new server in a network environment, the network administrator will typically back up the entire user IDs and passwords from the old computer then transfer these settings to the new computer. The backup and migration of user IDs and passwords makes it possible for users to sign on to the new server without creating new user profiles and user identification files.