Your BluRay drive didn't come with a BluRay player software?
Strange..
Most OEM drives don't come with the software - it is why they are usually priced so cheaply relative to retail drives which include software.
I can't seem to find any free reliable software to play Blu-ray films on my PC. I tried VLC put the AACS keys available for it are not complete and many movies do not work. Why do they make it so difficult to play these movies that I rent or own.
You aren't going to find any free software to play blurays. You'll have to invest in software to do it.
My experience is the best software to purchase is Slysoft's AnyDVDHD. While it has gotten somewhat expensive (though not any more so than most other paid commercial playback software packages on the market), it is very frequently updated and well supported by Slysoft. With AnyDVDHD installed, you can use either Media Player Classic and VLC Player to play your Bluray discs. DVDFab is also popular, but I don't know much about it as I don't use it.
If you can catch one of their 40% off coupons, ArcSoft's Total Media Theatre is probably the best of the regular commercial packages. However, I never cared much for it as I absolutely hate the user interface.