was introduced

  1. When window XP (of 32-bit) was introduced, all my dos oriented programmes couldn’t function.
  2. When window XP (of 32-bit) is introduced, all my dos oriented programmes couldn’t function.
    Please correct the above.
    Thanks.
  1. When Windows XP (of 32-bit) was introduced, none of my DoS-oriented programmes could function.
  2. When Windows XP (of 32-bit) is introduced, none of my DoS-oriented programmes functions.
  1. When Windows XP (32-bit) was introduced, none of my DOS-oriented programmes could function.
  2. When Windows XP (32-bit) is introduced, none of my DOS-oriented programmes will function.