Hp 8730w laptop ,Windows 7 Hanging Issue on 64 Bit Operating system

I have a laptop model HP 8730w. I know it can support 64 Bit Windows 7 operating system.The issue is that I installed Adobe Reader ,VLC Player, and MS Office etc on Windows 7 64 Bit. I found that my pc become hanged on 64 Bit operating system. Kindly tell me How can I resolve that problem?

Thanks