Freezing Issues?

[robbierob03]

Not sure why I'm experiencing freezing with such a monstrously spec phone, but after a few weeks I am having serious issues with the phone freezing for minutes at a time !

I keep getting errors that say "Activity Home (the actual program depends on whatever action I was taking - e.g. Home Screen or gmail) is not responding", and then it asks me if I want to force close it. This is my first android phone so i'm not entirely sure what this means. I haven't rooted or done anything like that, so could it be some program i've installed? I'm about ready to completely wipe the phone and start over, but wanted to know if there was some way I could troubleshoot the issue.