Limited Access to A Wireless Network?

So my mom's HP laptop suddenly says 'limited access' when she tries to connect to her mother's wireless network. She is connected to it, I believe, but it won't let her get on the internet. It works fine on my laptop. It' done this before on mine, although I was able to fix it. I'm not... show more So my mom's HP laptop suddenly says 'limited access' when she tries to connect to her mother's wireless network. She is connected to it, I believe, but it won't let her get on the internet. It works fine on my laptop. It' done this before on mine, although I was able to fix it. I'm not sure how I fixed it. It's been awhile. So, how can this be fixed?
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