Having windows installed, don't install adapter back at once, or it will stick at boot the same way. Install Broadcom drivers before. Then try to boot with adapter having laptop still disassembled....

Google finds it quickly ;)
Look here for example. Stop at 3:12, here's an adapter, a little square with a white label to the left of the MB, having some wires going to it. Unscrew it and take away...

Here's a solution: detach a wireless network card and continue installation. It will be OK this time.