Thank you for posting on the CostX Student Forum.
Based on the error message it seems you may not have admin privileges to install CostX on your laptop.
Please check with your IT team to check if they have an admin account. If you are not an admin customer, you will need to be added as an administrator on your laptop, or your IT team can install for you using their admin privileges.
Please contact firstname.lastname@example.org if you still encounter this issue.
CostX Forum Admin