term.clear()
term.setCursorPos(1,1)
rednet.open("left")
rednet.open("right")
rednet.open("back")
function credits()
term.clear()
term.setCursorPos(1,1)
print("---ProVirus---")
print("ProVirus Made and coded by ComputerCraftFan11")
end
print("---ProVirus---")
print("1. Check Computers")
print("2. Credits")
print("3. Quit")
while true do
local e,key = os.pullEvent( "key" )
if key == 2 then
  break
elseif key == 3 then
  credits()
elseif key == 4 then
  os.reboot()
end
end
term.clear()
term.setCursorPos(1,1)
print("---ProVirus---")
print("Waiting for a computer to respond.")
print("Make sure you intalled the virus correctly.")
print("Press Ctrl+T to cancel.")
id, message = rednet.receive()
rednet.send(id, "Received")
term.clear()
term.setCursorPos(1,1)
print("---ProVirus---")
print("Computer " ..id.. " has joined!")
print("Would you like to hack that computer?")
print("1. Yes")
print("2. No")
while true do
local e,key = os.pullEvent( "key" )
if key == 2 then
  break
elseif key == 3 then
  os.reboot()
end
end
function menu()
term.clear()
term.setCursorPos(1,1)

print("---ProVirus---")
print("Connected to " ..id)
print("Commands: | Fun: | Other:        |")
print("1.Spam   |2.FakeOff|3.            |")
print("4.Clear   |5.       |6.           |")
print("7.Reboot  |8.       |9.           |")
print("10.         |11.   |12.          |")
end
menu()
while true do
local e,key = os.pullEvent( "key" )
if key == 2 then
  rednet.send(id, "Spam")
  menu()
end
if key == 5 then
  rednet.send(id, "Clear")
  menu()
end
if key == 8 then
  rednet.send(id, "Boot")
  menu()
end
if key == 3 then
  rednet.send(id, "Off")
  menu()
end
end
And install this on theirs:
term.clear()
term.setCursorPos(1,1)
rednet.open("left")
rednet.open("right")
rednet.open("back")
local derr = 1;
print("CraftOS 1.3")
print("> ")
while true do
rednet.send(derr, "Hello")
id, message  = rednet.receive()

if message == "Spam" then
  print("Error!")
  print("Error!")
  print("Error!")
  print("Error!")
  print("Error!")
  print("Error!")
  print("Error!")
  print("Error!")
  print("Error!")
  print("Error!")
  print("Error!")
  print("Error!")
  print("Error!")
  print("Error!")
  print("Error!")
  print("Error!")
  print("Error!")
  print("Error!")
  print("Error!")
  print("Error!")
  print("Error!")
  print("Error!")
  print("Error!")
end
if message == "Clear" then
  term.clear()
  term.setCursorPos(1,1)
end
if message == "Boot" then
  term.clear()
  term.setCursorPos(1,1)
  print("CraftOS 1.3")
  print("> ")
end
if message == "Off" then
  print("Goodbye.")
  sleep(1)
  term.clear()
  term.setCursorPos(1,1)
end
end