Can you tell us what OS version you are running and the exact wording of the C++ error you are receiving?
Can you tell me if your copy of XP is a full version, Not an OEM from another machine or an upgrade disk?
I am usually here from 6pm onwards.
Now can you tell me what type of machine this OEM version is for?
I am in the Eastern US.
How did you activate these copies of XP and did they activate properly?