On a Friday morning , after finishing your bath, select an appropriate location in your house to perform the ritual/pooja (preferably in the north-east corner or any other clean area). Then wipe the floor with a wet and clean cloth. Now place a lamp in the center of the cleaned area. Place 5 threads with ghee(clarified butter) and light the lamp.The lamp should be kept alight throughout the day. Now place 3 fistfuls of rock salt in a copper bowl and take a few lemons (one lemon for each room in your house, plus 4 extra lemons). Place the lemons on a plate beside the lamp. Now take a few toothpicks and poke each lemon. Then keep some bananas on a plate, beside the lamp.
Now place a photo of Lord Narasimha / Nrisimha behind the lamp. Then take a pinch of rock salt with the ring finger,index finger and thumb of your right hand. Now chant the following mantra :
In the evening, after you finish bathing, sit beside the lamp. Take a clay pot (or any other vessel which can bear heat) and place it beside the lamp. Now place some camphor and wooden chips in the pot and light it. Light another lamp beside the pot. Then take a fistful of dried whole black pepper on a plate. Now take each pepper in your right hand hand chant the following mantra :
After chanting the mantra, put the pepper into the pot. Keep repeating the ritual until all the peppers are over. (Put few wood chips in between to keep the fire burning). Then take 3 fistfuls of rice in a bowl. Keep chanting the mantra used for the black peppers and put a grain of rice into the pot after each repetition.
Now take a bowl of water in your right hand. Take some water in your right hand and chant the following mantra : om maha narasimhaya namah ॐ महा नरसिम्हाय नमः , and sprinkle the water all around and inside the house. Sprinkle everywhere in your house, including all metal objects, dresses and mirrors.
With the infinite grace of Lord Narasimha , the ghosts / evil entities will not be able to stay in or at the premises of your house anymore. Om