How to turn virtual Win10 to 64bit with Virtual Box on Win10 when Hyper V doesn't work?

Question

EDIT: Hyper V isn't compatible with Virtual Box anyway as mentioned in a comment
- but I leave it in the title since others might fall for the same issue as me.

I'm running Win10 on a virtual machine and when I try to install a new program I get following error:

So I check the log file and find this:

[20F0:2574][2018-07-26T19:39:32]i052: Condition 'VersionNT64' evaluates to false.
[20F0:2574][2018-07-26T19:39:32]i000: Condition failed: This application requires 64-bit operating system. 

I think: "Oh, I guess this is a 32bit version", and I check it in the properties of the VM, but it says otherwise:

But then I think "Maybe it's just a label, and in reality it is 32bit indeed." So I google around how to change it to 64bit and I find that I have to activate Hyper-V on my non-virtual Win10 to make it work, so I check all these Hyper-V boxes, restart, and try again (Don't get confused - in the screenshot they're not checked yet, but I did check them).

But then the Virtual Machine won't even start anymore:

I have an AMD Ryzen 5 1600 six-core processor, in case that is important to solve this problem and my host operating system is Windows 10 Pro 64bit.

Anyway, after all this I ran out of ideas and posted my problem here - can anyone help? Unfortunately there doesn't seem to be a 32bit version of the program I'm trying to install so I gotta get this to work somehow.

Answer 1

My initial thought "it's 32-bit" was correct, I just got confused by that "64-bit"-selection (2nd screenshot). Turns out, that selection is correct though, because when I change it to 32-bit I can not start the vm anymore...but that wasn't the problem here.

The problem was that I didn't have a 64-bit Windows operating system on my vm. So I searched around on here, found how to get it, and created a new vm. For that specific program I was trying to install, I additionally had to turn the RAM up to 8Gb and then finally everything worked!