How do I deal with uneven cooling?

So I just bought my house it's about 35 years old, so it's not particularly old. It's two stories with a basement. So I have a hot upstairs, comfortable main floor and a freezing basement.

My plan is to generally improve the insulation in the attic. It's currently about 1ft deep with fiberglass insulation. Also, to replace the windows. But I'm worried this won't be enough at all.

So, what are the solutions after that?

Thanks ahead of time.

submitted by strippingworrior
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