Massimo Luongo gave Swindon their first league win of the season as they edged past Stevenage.
The midfielder, one of four Tottenham loanees on Swindon's books, scored in the first half with a 20-yard shot past goalkeeper Steve Arnold.
Arnold has earlier made a spectacular save to deny Andy Williams.
After a nervy first-half, Boro improved after the break but Greg Tansley blazed over and Dani Lopez missed an easy header from four yards out.
VIEW FROM THE DRESSING ROOM
Swindon Town caretaker manager Mark Cooper told BBC Wiltshire:
"In the first half it should have been all over. It's definitely the best we've played and the football was exceptional.
"When you play that well and you go in 1-0 at half-time then there is a bit of pressure and we felt that in the second half.
"The first half was a product of the group getting to know each other."
On taking over the job on a pemanent basis:
"Of course I'd like the job. I've enjoyed the role and everyone has made me feel so welcome. It seems to be getting better every week."
Stevenage manager Graham Westley told BBC Three Counties Radio:
"We've made a lot of changes and we're realistic enough to know it would take time to settle the side down and get us playing to the type of level that we need to play at.
"In the first half, I think our way of playing was a little bit confused. We talked to the players about intelligent football, being prepared to turn sides as well as being prepared to play, and I think we were a bit predictable.
"I thought we were much better [in the second half]. When you're building a new side, it's difficult for the team to understand changes after a great win like Tuesday's [against Ipswich], but possibly I should have used my experience to change the side up today.
"The learning process is never an easy one. I think you've got to make sure you don't get carried away when things go well, and don't get carried away when things don't go so well."