Movie4u is a sharing website where users/third party sites can stream movies & tv show links where others can watch movies directly on the website for free without the need to download any plugins or add-ons. (Except flash of course)
The best thing about the website it got lots of streams to watch from with different quality for all kind of movies , the downside is that there is no translation/language options when you need one.
If the website is caught as a virus, don't panic it is just a false positive.
Here are proof that the website is clear of viruses.