Basically... this error message is being caused because some GJ startup files cannot be copied as required. Can you please post your "profile.log" file after you try and start World in Conflict (this will be in the GJ directory).
The profile.log file for GJ installed in Traditional Chinese Windows Vista is
'Game Jackal log file - Profile
Log date - 24/10/2007 8:54:10 下午
***********************************************
[24/10/2007 8:54:10 下午] Profile - World in Conflict
[24/10/2007 8:54:10 下午] Profile mode: 2
[24/10/2007 8:54:10 下午] Profile CP: 1
[24/10/2007 8:54:11 下午] Driver mode: 43533
[24/10/2007 8:54:11 下午] Using external launcher - C:\Program Files\SlySoft\Game Jackal\?櫑綻??L.exe
[24/10/2007 8:54:21 下午] Media information
[24/10/2007 8:54:21 下午] Name - WIC
[24/10/2007 8:54:21 下午] Serial - 258571
[24/10/2007 8:54:21 下午] Size - 0
[24/10/2007 8:54:21 下午] Profile deactivated.'
The profile.log file for GJ installed in Traditional Chinese Windows XP is
'Game Jackal log file - Profile
Log date - 24/10/2007 10:08:26 p
***********************************************
[24/10/2007 10:08:26 p] Profile - Supreme Commander
[24/10/2007 10:08:26 p] Profile mode: 2
[24/10/2007 10:08:26 p] Profile CP: 0
[24/10/2007 10:08:26 p] Driver mode: 37545
[24/10/2007 10:08:26 p] Using external launcher - C:\Program Files\SlySoft\Game Jackal\47228L.exe
[24/10/2007 10:35:35 p] Media information
[24/10/2007 10:35:35 p] Name - SupCom1
[24/10/2007 10:35:35 p] Serial - 3682851022
[24/10/2007 10:35:35 p] Size - 0
[24/10/2007 10:35:35 p] Profile deactivated.'