Do I have full Administrator control over the NZXT Flex PC?  Can I install software without restrictions?

Yes, all NZXT Flex systems will be shipped restored to factory settings and will be prompted to create your account at first boot.  This will be a full Windows account with Administrator level access which will allow you to install and update drivers, software, etc.  NZXT does not restrict the software that can be installed on NZXT Flex PCs.