For using onboard graphics with 64bit OS machines (CT-8000IP and NH-4500 Series included), please do not use the version between 7.0 and 7.9, at least run 7.10 or higher to avoid display issues.
Whenever your customer plans to upgrade the mainconsole software, please consult with the tech support, the software version upgrade not only include the new features and bugs fixed, but also camera device pack. It could cause the new camera device pack does not compatible to old camera firmware and having trouble communicate with cameras.
Please follow the below order to upgrade mainconsole server.
3.5 to 4.1.8 then reboot,
4.1.8 to 5.0 then reboot,
5.0 to 5.1 then reboot,
5.1 to 5.2 then reboot,
5.2 to 6.1.1 then reboot,
6.1.1 to latest then reboot.
From Mainconsole v7.0.0, the installation package will contain both 32-bit and 64-bit applications and automatically identify the version of OS to install the compatible one.
To run Mainconsole 64-bit, please refer to [Mainconsole] How to launch Mainconsole 64-bit.