VLC crashes my macine?!

[Dual-Core_Danny]

Only happens when I play HD content, usually it will crash after 2-5 mins and everything freezes! I have to hard boot to restart the whole PC. Cpu load is around 30-40% and temps are 48-52C accoring to Everest ( BTW its an 805 D chip ) Doesnt matter if the cpu is overclocked or not, Everest stress test at 100% cpu utilization is no problem as well as 3D apps/games. Any ideas?

P.S. Also using the slider bar to scan through a movie seems to take forever to work, and can also make everything crash.