VirtualBox no longer supports 32bit since 6.0 and the Genymotion with VirtualBox installation package includes VirtualBox 6.0.4.
To use Genymotion on Windows 32bits:
- Download Genymotion Desktop 3.1.1 installer without VirtualBox
- Download and install VirtualBox 5.2.32 from here
x86 architecture is now obsoloete and may not be suitable for modern Android virtual devices, such as 8.0 and above. For these reasons, we do not recommend using Genymotion Desktop on Windows 32bits.