Dad's router and main PC is at point A. I want to connect using laptop's wifi from point B but I don't get any signal.
I only get the signal (and a very strong one at that) if I go to point C. However that's not practical because it's on the roof & exposed to the weather!

I don't get a signal neither if I put the laptop on the window-sill under point C.

My guess is that the signal isn't passing because of the thick wall and lots of soil/earth because of the slope...

I do get a signal if I stand near the window, and hold the laptop outside with both hands outstretched as to get very near point C but that's obviously not practical either...

What I want is to get the wifi signal next to the window, so that I can put a desk near the window and stay with the laptop there. Or get the signal so that I can use it from the desk at the bottom floor. Either way it makes no difference for me as long as I get the signal indoors.

I've read about cantennas and the like, but I'm not sure whether they'll apply in my case since the signal is very strong outside, I don't really need to boost it but just 'turn' it round a corner.
Another problem to using a cantenna is that my laptop's got an internal Intel Wireless WiFi Link 4965AGN which has got nowhere in which to plug an external antenna.

I wouldn't want to spend a fortune to get this working, not more than €70 preferably but I do need guidance as to what I might need to buy please!

Oh and I've got an Infosmart INAP88 802.11b Wireless LAN Access Pointwhich I can use, if it is possible to use it in my case?

Is it possible for me to connect wireless this way -

Laptop wifi -- Infosmart -- Dad's router -- Internet?

If yes, do I have to connect the Infosmart with ethernet cable to my laptop or will the lappie's wifi connect to the Infosmart?

Thanks a lot!

You would need to use an external antenna for your wireless adapter.

Thank you but the thing is that my laptop isn't recognizing the WAP (note it's a WAP not a Router) :confused:

I'm sure I'm missing out something.

Ideally yes, I would put an antenna on point C. connect antenna to WAP, connect WAP to laptop - wireless or wired...

You are being limited with the signal as it is trying to pass through the ground and wall to you. You have a couple of choices.
1. Depending upon the distance you can run a ethernet wire from your father's house to yours and then connect the end at your house to the laptop or to a WAP inside of your house. This will give you the use of his internet connection and WiFi at your place if that is legal where you live.
2. You can try to install a repeater with the antennae close to C. If the antennae can pick up the signal you can extend it into your place. This would again require the purchase of anther access point and defining it as a repeater.
3. Have you tried using an external antennae on your Dad's WAP. If you can get it high enough you may be able to get the signal to your place. I doubt it will work but you can try
Just some thoughts

I think I was not clear on this. I am talking about an antenna for your wireless adapter. This does not matter if you are using a router with a WAP or just a WAP by itself. I am an RV'er and also have property out in the country with no cellular or broadband access. You would be surprised what a displaced city boy will do to get access out in the country.

Take a look at the instructions for the Cantenna How to build a tin can waveguide antenna

To add an external antenna adapter to a laptop, Repair4Laptop: Adding External or Internal WireLess LAN Antennas for Laptops & Notebooks

Ready to buy kits, JEFA Tech Home

Is there any point above C on another floor where you can get a signal?

Try to place the antenna's in different orientations and, if possible, one in the same orientation as the laptop screen.