To everyone who had my problem ( having good computer - 4gb of ram and I set my minimum page file to 6000 and maximum to 12000 - and latest Warband patch but still not being able to play) I have found the solution!
- Go to Documents
- Open Mount&Blade Warband folder
- Open rgl_config
- Change the value in render_buffer_size to 256 ( after playing Brytenwalda if you play another mod change it to the previous value; i.e: mine was 204

- Enter game, new game, spawn at the Briton Kingdom. Do not spawn at an irish kingdom or any other ( at your own risk!).
- Play and have fun.