It was a 62nd-minute goal from winger Etienne Esajas that secured the Iron a hard-earned win, with the visitors having two second-half 'goals' from striker Reuben Reid disallowed.
"Our first-half display was probably the least effective we have produced all season," he confessed.
"We were simply giving the ball away far too easily when we were in good possession, particularly in the wide areas.
"That was something we improved on much better in the second half.
"That enabled us to keep the ball away frokm Plymouth for longer periods and when we did that, they could not hurt us.
"I was delighted with the goal for Etienne Esajas. It's his first for us and should get him up and running now.
"And once we were in front, this was a game I could not see us losing.
"We were unlucky not to get a second when Deon Burton's shot has come back from off the bar.
"But in terms of chances we have not created as many as we have in other games this season.
"When that happens it is important to take the ones you do get - and that is what we have done today.
"A second successive clean sheet is also pleasing and a second successive win will help the confidence," said Laws.
Plymouth were out of luck twice in the second half when striker Reid had the ball in the back of the net.
His first effort after 49 minutes was ruled out for offside and 20 minutes later his thundering header from a Jamie Reckord cross was ruled out for his over-robust aerial challenge on Scunthorpe skipper Andy Dawson.
- Sports & Recreation
- Etienne Esajas