This is your personal issue and you have to take a decision.
In general several innocent and not educated women make a living only through rents and follows the earlier procedure out of ignorance.
Not taking proper precautions for safety of their own belongings in any public place and in un locked room, keeping a lap top in open almirah lures any one and there is negligence in you.
I do not know, whether it is proper to proceed against a self employed woman, for one's own negligence, digging out un connected things and dragging all this only because of loss of lap top. No one can judge or decide, it is left to your wisdom, as you have seen the PG accommodation, knows the available facilities, enjoying as a guest and expect the hosting woman to be a watchman to guard your belonging, when the room was unlocked and when there are several residents.