not all wifi devices are created equal. Your laptop's wifi antenna might not be as sensitive as your friend's laptop so you end up with less signal strength.
Solution with your home setup would be:
1. place your router nearer to where you would be working with your laptop more often.
2. upgrade the linksys router's antenna... kinda pricey but it does work to increase signal strength to a degree.
3. buy a wifi adapter for your laptop, either USB or PCMCIA type to replace your built-in wifi adapter. Note that PCMCIA cards tend to drain the battery in laptops.
4. buy a linksys wifi repeater to amplify the signal at the far end of your home.



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