How to find Windows Utility as wireless utility application got corrupted

Hey there,
Can somebody help me, on how to get my wireless network working?
My wireless utility application got corrupted, so I uninstalled it. I later found out that I misplaced my wireless card CD, so I could not reinstall the utility.
I know Windows has its own utility but I could not find it on network connections. I know the wireless card works, since its blinking from time to time.
I'm using Windows XP Home Edition SP3.
