In the days of Y2K we would send out code/instructions for manufacturing bootable floppies to be couriered to every team /office and quickly passed around in the morning after. Field operatives phoned up and told to rendezvous with managers at usual burger joint.
That way one delivery does 10 - 1000 fixes using no local IT team
In these days of uncontrolled update/patch delivery, no accessible USB drives and locked down BIOS it's a self inflicted problem for the next IT convention