Solved: Copying the contents of a surface 3 to a surface 4

If you are talking about data, and you are using the default setup which uses an m$ account rather than a local account when you logon to the PC, the data is stored in your OneDrive cloud. You then just need to use the same OneDrive account on your new PC and it will sync. As for the m$ store bought crapps, for those it depends on their license. Many can be run on more than one device with the same purchase, and that should also sync via the m$ account. Those that you are only allowed to run on one device, you should be able to unregister them for the first surface, and register them again for the 2nd one. For some you probably got an email with the license details, so read your old emails for details.

As for normal non crapp software, unregister it then uninstall it on the original PC, then install it on the new one and enter the proper details like product keys. If you have problems with activation just check the homepage of the software company for details, or send them emails.