Delete the Virus

Firstly, the bird, due to it not being stated that they were being held by something, puts the fire extinguishers in its B.I.R.D. (Bird Inventory/Recycler/Defender), allowing it to recycle the fire extinguishers into their constituents, allowing it to use these constituents to give something an aspect or just make something else.
The bird then firewalls in the Processor, both heating it further and preventing anything from getting to it.
The bird then uses the scrap metal from the aforementioned BIRDed extinguishers to help with building the fortress. (3/5)