Your dump files are unreadable but your graphic drivers were involved in the crash (nvlddmkm.sys)
Is this an official version of Windows 7? , your system files are different
- Boot into safe mode with networking
- Uninstall the Nvidia drivers
- Use driver sweeper to remove leftover Nvidia display driver files
Guru3D - Driver Sweeper
- Reboot in safe mode with networking
- Install the latest drivers
Drivers - Download NVIDIA Drivers
- Reboot into normal mode
Test your RAM
RAM - Test with Memtest86+