Always create backup copy

Checks/unchecks the corresponding UI option found under File tab | Options | Advanced | Save.

Supported on: At least Windows Vista
Registry HiveHKEY_CURRENT_USER
Registry Pathsoftware\policies\microsoft\office\14.0\word\options
Value Namebackupduringsave
Value TypeREG_DWORD
Enabled Value1
Disabled Value0

word14.admx

Administrative Templates (Users)