We have tried copying profiles using the System/Copy profiles and we have tried copying the Old user from Document & settings to the new user profile. But some things such as IE History don't seem to copy. Microsoft says that if we're using the latter method, don't copy the NTUSER.DAT, NTUSERDAT.LOG files. The problem also applies where PCs running XP Pro in a Workgroup situation are then added to a Domain (a new user profile is created). I understand that happens, but want to keep the new profiles as near to the original as possible.
This was first published in February 2004