MINNEAPOLIS — Adrian Peterson powered in for three first-quarter touchdowns to build a lead large enough even Minnesota couldn’t lose it, and the Vikings finally earned their first victory Sunday by beating the bumbling Arizona Cardinals 34-10.

Peterson rushed 29 times for 122 yards and Donovan McNabb jogged in for a score, too, as the Vikings (1-4) made it 28-0 less than 12 ½ minutes into the game. Kevin Kolb had three turnovers for the Cardinals (1-4) and finished 21 for 42 for 232 yards and one touchdown pass, a performance so shaky the Vikings were able to confidently run down the clock after stumbling through the second and third quarters.

This wasn’t a productive afternoon for either former Philadelphia quarterback, from McNabb’s bounced passes to Kolb’s errant throws.