I am using XP and can't connect with Wi-Fi. My friend say WZC is missing. Any solution?

1. Start->Run
2. Type regedit
3. Click HKEY_LOCAL_MACHINE
4. Click SYSTEM
5. Click CurrentControlSet
6. Click Services
7. Click WZCSVC
8. Add a DWORD entry named "Start"
9. Change value as "2"