Need suggestions for Wireless Booster or similar.

Hi,
I have tested my laptop in my pit and I am getting a very weak wireless signal.
Not suprising considering it has to go through several walls, then 75 feet to my garage down the bottom of the garden, then through an aluminium nose cone and finally into my 'puter.
I have looked at signal boosters or repeaters but my head is now hurting as to which one to buy.
Any recomendations?
Allan.

Allan there is a YouTube video describing how to increased wireless signal strength. Looks simple enough but have not had time to try it.Let me know how u make out.
Bob