from where did he complete his education?
He did his B.A. from the University of Paris and studied civil law from the University of Orléans.
Walter de Coventre
De Coventre received a B. A. under John de Waltirstone from the University of Paris by Lent, 1333. Although he had probably completed a Licentiate in the Arts and a Master of Arts by 1335, because of gaps in the Paris records it is not certain that he was a Master until April 1345.

He moved on to study civil law at the University of Orléans,
who was walter de coventre? A 14th-century ecclesiastic. where was he from? It is speculated that he may have been from Abernethy.
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Walter de Coventre [SEP] Education
On 7 October 1349, Pope Clement granted an indult to Walter allowing him to be absent from his cure while he continued his studies at Orléans. He may already have been a Doctor of Civil Law by that point, because in the following year, on 22 November 1350, he is found as such acting as the Regent of Orléans presenting a candidate for licence. Having studied civil law for the highest qualification available, de Coventre moved on to canon law. By 28 March 1351, he possessed a Bachelorate in Decrees (canon law). This was perhaps why on 16 April 1353, he obtained from Pope Innocent VI another grace for himself.