If anyone is using a Dlink wireless card WDA-1320 and others, then ensure you download and install the latest drivers for XP, usually version 1.30 for XP and Vista first. Usually, the service pack 3 update causes a BSOD on first restart and various errors on many boots if you have older drivers.
WZCSLDR2.exe - Entry point not found
AirGCFG.exe - Entry point not found
A provider, Rsop Planning Mode Provider, has been registered in the WMI namespace, root\RSOP, but did not specify the HostingModel property.
Hope that this helps anyone.