tbrowse.lua

local function main()
  shell.run("/disk/browser.lua")
end
local function anticopy()
  local oldpull = os.pullEvent -- saving a copy of the old os.pullEvent
  os.pullEvent = os.pullEventRaw -- os.pullEvent terminates when it receives terminate event, pullEventRaw does not

  while true do
    evt = {os.pullEvent()}
    if evt[1] == "terminate" then
        term.setBackgroundColor(colors.red)
        print("YOU ARE TRYING  TO TERMINATE PROGRAM! NOW FULLY RESTART YOUR PC")
        -- do other stuff here
    end
  end

  os.pullEventRaw = oldpull -- always reset what you changed
end
parallel.waitForAll(main, anticopy)