If you just need wireless on an old XP machine, consider replacing the USB adapter with a that still provides XP drivers (e.g., some Realtek RTL8188EU based adapters still have community XP drivers).
Do not use "Driver Booster" or "Snappy Driver Installer" on Windows XP unless you have a full system backup. These tools often install incorrect LAN or chipset drivers that corrupt XP registries. Rt73 Usb Wireless Lan Card Driver Download Windows Xp
Offers the latest stable versions for Windows XP (both 32-bit and 64-bit). If you just need wireless on an old