How can I purify my laptop after Najis water - not containing Ayn al-Najasat - fell on it? Since it is not waterproof, I cannot pour Kurr or Qalil water. Would wiping it three times with a wet cloth be effective for purification?
Bismihi ta'āla
No, wiping it will not remove the najasah. There must be pouring of water.
You might be better to just keep it that way, although you might be concerned about using it when your hands sweat, etc, or maybe trading the laptop with another new one.
It might be a bit risky, but you can put the laptop upside down, and spray water upwards, hoping it does not go in, and then dry it quickly. It does not need kurr water, and does not need a lot of water as well. This is just a suggestion.
And Allah knows best