Three second half goals in a 15 minute spell shortly after the interval sealed what proved to be the host's biggest home league win since March 2022.
With new loan signing Ellis Craven in goal there was a late change to the starting line up as Sam Howell replaced Kyle Haylock, who dropped to the bench.
The Trawlerboys - in their orange away kit - fell behind to an early goal inside the opening five minutes as Walsh cut in off the left wing and fired a powerful shot home.
The Trawlerboys hit back and were so close to an equaliser when they were awarded a free kick in a dangerous position.
Harvey Sayer's superb effort beat the keeper but rattled the crossbar and as the ball was scrambled clear Sam Johnson's shot went wide.
It remained 1-0 at the interval, but another fast start from the hosts saw them double the advantage less than two minutes after the break.
Erin Amu curled home a left footed effort that went in off the post to make it 2-0 on 47 minutes.
Ryan Charles then headed home Dasilva’s cross from the right in the 59th minute, and it soon became 4-0 as Walsh's low cross was tapped home from close range by Fabio Virciglio in the 62nd minute.
Craven made three good saves before Joao Rangel raced through on goal for The Trawlerboys on the counter attack but Krasniqi dived at the winger’s feet.
Deep into injury time, Rangel went close as his deft chip from the left side of the box went just wide.
Lowestoft Town: 1 Ellis Craven, 2 Charlie Norman (c), 3 Benjamin Haddoch, 4 Louis McIntosh (Eagle 72), 5 Dylan Ruffles, 6 Jesse Ayoola, 7 Samuel Howell (Atkinson 72), 8 Samuel Johnson, 9 Gabriel Overton (Blogg 72), 10 Harvey Sayer, 11 Joao Rangel. Subs: 12 Ashton Blogg, 14 Kyle Haylock, 15 Robert Eagle, 16 Ben Atkinson.
Attendance 447