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Make sure that in the device manager power saving options are switched off, download inSSIDer by metageek, install it on your laptop and this will confirm if you are getting an ok signal. It will also tell you if other wifi networks are competing and interfering with yours, if they are, try changing the wireless channel your access point is using between 1,6, & 11, (in fact just try this anyway).
You can get a password for your wi-fi internet connection. You have just need to follow the instruction on given link. It will help to configure wifi internet to your toshiba laptop.