Most newer Android devices can be remotely locked -- so too can Windows systems depending on how they're configured. The only way you can trace the PCs is if they're subscribed to a tracking service before they're lost or stolen.  They cannot be tracked by MAC address.  
Stolen Laptops that need to be traced. Can you please inform us what to do? We have the police case number and the serial numbers.    Description SN/ST MAC Location 1 Dell Latitude 5400   3448ED261611   2 Dell Latitude 5400   3448ED26163F   3 Dell Latitude 5400   3448ED261BD8   4 Dell Latitude 5400   3448ED2A2D1D   5 Dell Latitude 5400   3448ED2A23C6   6 Dell Latitude 5400   3448ED2A23B3   7 Dell Latitude 5400   3448ED2A2314   8 Samsung Galaxy Tab A 356224109562104 NA   9 Samsung Galaxy Tab A 356224109560868 NA     Police case number No 67 / 4 esquadra 2022  
Stolen Laptops