1) What version of NVIDIA driver are you currently running?
2) Have you upgraded the NVIDIA driver since you got the laptop?
3) What applications have you installed to this laptop?
4) Has this issue occurred recently or has it been a constant problem since you got the laptop?
If this was a very recent issue, I'd try Windows System Restore to restore your system to an earlier time prior to when the problem first occurred. If not, I would try installing a different (preferably more recent) version of the NIVIDIA driver using an NVIDIA clean install.
G74SX-A1 - stock hardware - BIOS 202 - 2nd Monitor VISIO VF551XVT