You never should install hardware with the system powered up.
I think I'd try System Restore to an earlier date. Do some testing to make sure the PC is running stable then try the install again. Driver software installed first. The power down, install hardware. Reboot and scan for hardware changes if the system doesnt detect it during bootup.
Just did a reformat and reinstalled Windows 7. Nothing is different..
I tried booting with just the wireless adapter installed, reseating my RAM, removing the cmos battery, and resetting the BIOS via jumpers but nothing has worked
Whats so frustrating is how I actually got it to work only for it to revert back..