When you use GoldMine alarms to remind you about activities, you'll notice that the default Alarm Time is 10 minutes past the Scheduled Time.
To change this;
1. Go to Tools, Options, select the Alarms tab
2. Set the desired default Alarm time by entering a value in the "Alarms Default Lead Time"
3. Ok your way out.
Pro Tip : Alarms are nice to use, but remember, when you Alarm every single activity, the resulting barrage of Alarms can frustrate users. Sometimes users will become "immune" to the constant pop-ups, therefore negating the purpose of the Alarm to begin with.