I recently moved in to a new house (with others) where the only highspeed internet available is portable wireless. There are currently 3 PC desktops, 3 PC Notebooks, 1 Macbook Pro, and my iMac using the connection. The problem is my iMac is the only one that has problems connecting to the internet. I have Airport turned on and it is telling me that I have a full strength signal comming in, but it won't connect to the network. It has connected on and off since we moved in but it's slow and won't let me upload anything. It's an open network and no-one else seems to be having this problem. We tried buying a signal booster incase that would help but it did nothing. I'm not sure what to try next as I've never had any problems with this before. I'm working from home and I depend on the internet for my job so I need help fast! Does anyone have any advice? Thanks!