I'd expect that you have a warranty longer than just 30 days. Probably at least 1 year, right? I'll base my answer on that premise.
In the first 30 days, you should look for things that are incomplete ... read more
You might want to have a energy assessment done through a program such as Home Performance with ENERGY STAR or a utility-specific program in your area. WIndows often cost a LOT (for a quality product) ... read more