If ever there was a love it or hate it suspense movie, it is Windcroft. But given that it is 4/10 at the time of my writing (with only 99 votes) it definitely looks like the "hate it" camp are winning. Just don't let its awful rating put you off. For this is in many ways an excellent movie which keeps you guessing (if you give it the time for its slow suspense to build); however, I'd say that you have to find yourself with an interest in its characters within the first 20 minutes or you will probably be annoyed by it ultimately.
When someone wrote that this was like a cross between the shining and Wuthering heights, they weren't far off the mark. For it definitely has elements of both in it.
Having said that, I don't wish to say too much more about it at present as I don't wish to give anything away. But it certainly deserves more than its current meagre 4/10 rating. The movie's direction, acting and screenplay were all first rate. Yet some of the complainers write that the movie is not explained and therefore it is rubbish. Well why does madness need an explanation always? Sometimes some people are insane and they are very good at hiding that insanity within themselves until...
By the way, I am not someone who ever enjoys b grade horror movies and still very much recommend this for those who enjoyed a movie such as 'Haute Tension', or, 'Ils' (aka Them).