Becuase the NB1200 loads drivers on your PC it is sometimes nessesary to disable Anti Virus software (Such as VET) temporarily to allow the NB1200 drivers to install correctly.
If you are having trouble installing the NB1200 on any OS please Uninstall any previous installations (including running the CLEANUP.EXE tool if possible) then disable antivirus programs.
Then follow the installation proceedure for the NB1200 as per the installation guide.
Once the NB1200 is successfully installed the AntiVirus software should be re-enabled.
Please see the Antivirus software's documentation or Help screen for information on disabling the software.