Many thanks to all who responded to this thread. Special thanks to Icit mate for everything. YoYo, thanks a lot for the dump diagnosis and the detailed and yet easy-to-understand explanation on driver verifier's diagnostic settings. I feel more confident about using driver verifier now. 
My Computer
At a glance
Windows 7 Home Premium 64bitAMD Phenom II X4 945DDR3 4 GB (2 Slots)Palit GTX 460 768MB
- Computer type
- PC/Desktop
- Computer Manufacturer/Model Number
- Custom build
- OS
- Windows 7 Home Premium 64bit
- CPU
- AMD Phenom II X4 945
- Motherboard
- Biostar A880G+
- Memory
- DDR3 4 GB (2 Slots)
- Graphics Card(s)
- Palit GTX 460 768MB
- Sound Card
- Onboard
- Monitor(s) Displays
- Philips 20 inch
- Screen Resolution
- 1600 x 900 native
- Hard Drives
- Hitachi Deskstar 1TB
- PSU
- Andyson 500W
- Case
- Ikonik EN2