When did this start? Did it occur after you have added any new hardware - USB attached device, PCMCIA / PCcard adapter? Not sure what else you can add in a laptop!
It appears that the built-in wireless adapter is not functioning, due to a PCI resource conflict in the BIOS. This might be an IRQ & port conflict, even though the PCI bus has its own interrupt mechanism.
The fact that it is a conflict suggests that the device is working, rather than failed. Are you booting with any PCMCIA / PCcard adapters installed? Eject them and re-try.
You should definitely run the F2 BIOS setup routine - don't worry, it's quite hard to do any damage, and you will be asked if you want to abandon all changes or save them before exiting.
If you have never used the BIOS setup, restoring the factory defaults might cure the problem.
Otherwise, experiment (cautiously) with disabling selected devices in the BIOS (if possible), one at a time, to see if you can remove the conflict. Candidates would be the sound, LAN network adapter, serial ports & modem for example, but NOT video!!
In windows, it would be worth checking the system event log for further information on what drivers and devices are not working. Also check the Device Manager in System\Hardware to see what devices are not working (yellow triangle). Might give a clue about what is conflicting with the wifi network adapter.
SD