Installing Alfred using a Virtual Machine is not different from installing it from your own computer.
 
Please follow the instruction from our previous help article > Getting Started with Alfred.
 
Using Mac:

https://meetalfred.crunch.help/getting-started-with-alfred/installing-alfred-on-your-mac

Using Windows/PC:
 
https://meetalfred.crunch.help/getting-started-with-alfred/install-alfred-on-your-pc