Hi, on a computer connected to the internet, with 4gb of ram, with a non-solid state hard drive, and at least a dual core processor between an hour and a half and 2 hours, if you mean just the installation without the drivers you wouldn't need internet, 40 minutes to an hour, or if you had them backed up from a previous installation if there was one.

It depends on a multitude of factors. The type of processor, the speed of the port, the hard disk where it is installed, the connection speed for downloading updates and drivers... it is impossible to give an exact time