desktop blinking screen - M17xR4 GTX 680M driver install failure

[Zonda_Cinque]

M17xR4 - Win 7 / 3720QM / 2GB GTX680M

Hardware ID:

PCI/VEN_10DE&DEV_11A0&SUBSYS_05511028&REV_A1

PCI/VEN_10DE&DEV_11A0&SUBSYS_05511028

PCI/VEN_10DE&DEV_11A0&CC_030000

PCI/VEN_10DE&DEV_11A0&CC_0300

About two years ago, I upgraded from the 660M to the 680M. Install and new driver install went smooth as could be since no bios update was needed. I chose the driver 310.90. Now, I'm trying to upgrade to the newest driver 358.91 and all hell breaks loose. The screen is constantly blinking on/off after installing the driver, no matter how I do the install - all in safe mode. Even after reverting back to 310.90, the screen still blinks after booting to the desktop. Driver install fails when I Fn-F7 to the dedicated card as well.

Please correct me if I'm wrong, but the procedure for uninstall/reinstall is:

- uninstall nvidia driver > reboot

- uninstall intel driver > reboot

- safe mode > install intel driver > reboot

- boot into desktop > Fn-F7 > reboot

- safe mode > install nvidia driver > reboot

That doesn't work anymore now. I've tried installing the laptopvideo2go 310.90 drivers with the modified nvwi.ini file to no avail. Copy&pasted the .ini file internals as drag&drop did not replace the file.

I read from j95's posts that the nvdm.ini needs to be modified instead.

- Do I need to replace the original nvdm.ini file with the modified nvwi.ini file?

- Can anyone tell me what I'm doing wrong?