Upon the death of the Salian duke Conrad I in 1011, the German king Henry II enfeoffed Adalbero with Carinthia.
Initially Adalbero sought a good relationship, he even acted as the emperor's swordsman at a 1027 synod in Frankfurt and during the coronation of Conrad's son Henry III as King of the Romans in Aachen at Easter 1028.
[2] However, after the court diet on 18 May 1035 Duke Adalbero was forced to renounce all his offices and fiefdoms.
[2] Furious, he began a bloody revenge campaign against the Salian liensmen in Carinthia, thereby killing Count William of Friesach, the husband of Saint Hemma of Gurk.
Adalbero married to Beatrix of Swabia (died February 23 after 1125), probably a daughter of the Conradine duke Herman II.