I have purchased the HP ProBook 4520s before three weeks and all the things were going fine with my laptop. Windows vista was preinstalled in my laptop. But I wanted to install the windows 7 in my laptop that is why I completely delete old recovery partition from my laptop and formatted the laptop and after that I installed the windows 7 in my laptop. After installing the windows 7 all the things worked great but I am not able to use the wireless in my laptop. Please tell me how to fix this issue.