Boosting a signal
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So I finally got laptop back today but annoyingly it wont connect to the internet. I'm using my xbox to write this. It seems it has a stronger signal than my laptop. The signal I'm trying to reach is a few floors down. My laptop is an Acer travelmate 4150 (looks old as shit) and has windows 7. Thanks in advance.
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Flaser
OCD Hentai Collector
If your laptop supports it, just gen an external antenna. If not, you'll have to get a USB wifi card with a replaceable antenna, then go get a bigger antenna if the card's built in is not sufficient.

http://compnetworking.about.com/od/wirelessfaqs/f/wifilaptoprange.htm
http://compnetworking.about.com/od/wirelessfaqs/f/wifilaptoprange.htm