Lucas Akins' goal separated the sides in a dour clash between Leyton Orient and Stevenage in League One.
The O's failed to clear James Dunne's free-kick, and Akins was on hand to fire a low, 20-yard drive through a crowded goalmouth and into the net.
Michael Symes' had the hosts' best chance but he headed wide when well-placed to score.
Marcus Haber should have added a second for the visitors but he failed to connect with Darius Charles' cross.
VIEWS FROM THE TRAINING GROUND
Stevenage manager Gary Smith told BBC Three Counties Radio:
"To win a game early on in the season, however it comes, gives everybody that little bit of confidence and gets us moving in the right direction.
"First half, I thought we managed the game well, some good possession, some good choices - when to go long, when to play short.
"When you look at the number of new bodies we've got in the side there's always going to be that odd decision that doesn't quite fit and piece of the puzzle that doesn't quite work.
"But at the moment the guys are doing a fabulous job of keeping the development and progression (of the team) going."
Leyton Orient 01 Jones 03 Sawyer Booked 04 Chorley 06 Baudry 15 Clarke 07 Cox 08 Griffith Booked 11 Smith (Odubajo - 62' ) 23 James 10 Symes 39 Mooney (Obafemi - 76' ) Substitutes 16 Allsopp 02 McSweeney 14 Laird 17 Odubajo 18 Lobjoit 20 Obafemi 26 Brunt Stevenage 16 Day 02 Gray Booked 04 Charles 05 Ashton 14 Roberts 07 Grant 08 Dunne 32 Shroot (Tansey - 46' ) 09 Haber (Thalassitis - 89' ) 11 Akins 15 Freeman (Morais - 72' ) Substitutes 01 Arnold 12 Furlonge 29 Ngala 06 Tansey 10 Morais 17 Ball 19 Thalassitis