From its inception to its conclusion, WINTER is a deeply ordinary and tedious film. The story is about your average 'family shifts into a new home and starts getting harassed by something evil' type of story. The problem with this film is that it never manages to raise the tension and the abundance of awful jump scares make it even more tiresome. There is also a small stretch in the film where it desperately tries to preach Vastu Shastra as a legit science, and it's as laughable as you can imagine.
The film tries to become interesting in its final stretch by revealing the actual villain, who is a random dude with no prior connection to anything up to that point of the plot, but the final sequences are very dull and drab. The villain is hyped up to be an unstoppable evil but in the confrontation scene, he comes across as comically inept and bad.
Apart from some good acting and some okayish background score, there is nothing to give praise. Similar concepts have been explored way better in many films and you shouldn't waste your time on this one. Just read its synopsis and be done with it.