Hi
You may have to include the mouse driver when starting the virtual machine.
For example:
Using bootable Mini Tools Partitions Wizard.
When booting start, it will include some generic drivers to detect hardware, such as mouse, in order to work,
There are also others issues.
For mouse, it is best to insert directly to USB 2 ports, instead of USB 3 ports &or Hub.
As USB 2 ports are meant for hardware that do not required &or unable to use high speed USB 3 ports.
Even some external HDD do include an additional usb 2 cable to connect to only USB 2 port for extra power.
Eric.