Try this:
Code:
timeout 5
:initialize
cd C:\Users\Dayz\Desktop\Serveur overwatch\tools
echo Starting db_utility ...
@start db_utility.bat
echo.
timeout 5
:initialize
cd C:\Users\Dayz\Desktop\Serveur overwatch\tools
echo Starting db_spawn vehicles ...
@start db_spawnvehicles.bat
echo
EXIT