hi i am looking to send a wifi signal from a wired router to my computer which has a wireless adapter,but the main network is wired how do i do this on the cheap?

You can just get wireless access points that would work as long as your wired modem/router has a spare network socket, but to be honest you're looking at a pretty much identical cost for a wireless modem/router, so to keep things simple you may as well just get one of those.

A quick look on ebuyer (all inc. VAT but exc. delivery) shows the cheapest access point at about £27.50 (http://www.ebuyer.com/product/112497), the cheapest ADSL wifi modem/router at £30 (http://www.ebuyer.com/product/198659), or if you're on Virgin their cheapest cable DSL wifi modem/router at £22.50 (http://www.ebuyer.com/product/88488) until Friday, so if you're on cable that's the way to go.

Your broadband provider may send one free of charge, If they supplied the original then phone them and say it's playing up and they may send a replacement which will most likely be wireless.

Good call, or alternatively (as if you tell them it's playing up they may try to "fix" it :hihi: ) I suppose you could tell them to upgrade you to wireless or you're changing providers.

just got a bluetooth acces point and dongle on ebay hope this works

Bluetooth has very short range and speed.
It is not proper wifi.
I think you will be disappointed.