I'm having the exact same issue with the Acer Aspire 5742. Any help would be greatly appreciated! I've tried using the function key with F3 to turn on the wireless but thats no help, the Hardware Driver in System>Administration>Hardware Driver has the activate button right there, but there's always an error. I've done my share of exploration but I was hoping there might be something I've missed that people could post back. thank you!!!