I have a system with Windows 7 Pro x64 on it (came with it) with a full Windows 7 Installation DVD. It has a 500 GB drive with an 8 GB RAM. I partitioned it with AOMEI to give me an extra 100 GB primary drive.
On this I wanted to install a Windows 8.1 (x64). But it just wouldn't let me...
64 bit
aomei
disk management
dual boot
file transfer
installation
installation dvd
mergepartition
operating system
partitioning
primary drive
problem solving
ram
remove os
system configuration
upgrade
windows 7
windows 8.1
x32
x64
