My laptop is super slow for no reason?

Okay so my mom bought herself a laptop from Amazon. It's a Lenovo/Windows. As soon as she took it out of the box and made an account and all. It was super slow. She ordered a new one… And have me this one. I you want to use it, just to look up something it takes about 20 minutes to load! I've deleted some apps so it ll go faster but I don't know what else to do. Is there something I could buy/ download?