Tablets don't have a HDD but a some form of SSD. And you can install Windows on a SSD just like you can install Windows on a HDD. So that's not the problem.
The problem is that Windows should support the hardware (CPU, motherboard) of the tablet. Luckily, it does on a device like the Surface Pro https://www.microsoft.com/surface/devices/surface-pro/overview, so you can use it in tablet mode with all apps that are available in the Windows Store or that come with Windows.
Even better, it already comes with Windows installed. No need to install that yourself.
Would anyone know what the advantages would be to have a tablet with an HDD installed for it's memory?
Is it so you can install pc windows or linux based programs on it like a PC?
I have a tablet but don't like the Android versions of apps like Google Chrome, therefore I want to use the PC version but on a tablet.