The upgrade keeps your files. Many programs might be kept as well: the upgrade assistant will scan your system before the installation begins and tell you if there is any incompatible software that has to be removed first. Settings will be migrated to equivalent Windows 10 settings.
The upgrade keeps your files. Many programs might be kept as well: the upgrade assistant will scan your system before the installation begins and tell you if there is any incompatible software that has to be removed first. Settings will be migrated to equivalent Windows 10 settings.
Of course, it's always best to keep backups in any event. There is a slight possibility something goes wrong in the upgrade, for example (let alone the possibility of a hard drive failure down the road)