Alienware screen flicker - constant 1 second black flashes or blinks in win7 desktop

Hi

I am a programmer and an advanced user so I want you to bear with me on this because I think it's a issue that partly belongs to windows and partly nvidia and I test what I am talking about before I say it :-).

I own a Alienware ANDROMEDA_R5 Intel i5-2320 3GHz 8.00 GB 64 bit machine bought only a few weeks ago

The system ran fine until I swapped a BenQ 241w Monitor instead of the factory sent dell monitor.

the problem is that ever since I physically replaced the monitor with the benq one the system blinks every time it seems to be doing some minor rendering option choices in windows. It's only ever happening on the desktop and it ALWAYS happens (for instance as I type this it will blink or flash (go to sleep) for ~1 or 2 seconds every minute or so) and even as I type this and registered on this forum it has happened 50 or 60 times.)

now there is *ABSOLUTELY NO* GPU overload - if I play high graphics intensity games there is not an issue but this is 99.99% of the time a work computer (I only used a game for 30-40 mins to test my problem) if I play a game - at high res or not - it works without any black screen flicker, flash or blink

What I think is happening is that nvidia GeForce GT 545 (which I updated yesterday and it did nothing) - it is version 301.42 - what I think is it's having a "conversation" with windows 7 desktop probably related to one of the theme properties (but I disabled them all sequentially and I can't isolate which one) and it seems to be having a "argument" over the display rendering and it seems to "constantly fixing display modes" trying to "help". the reason I say this if I swap the monitors back it doesn't do it any more and the only difference is a) the monitor drivers (no longer available - automated for windows 7) or b) the display size.. I think that this nvidia display adapter is fixated on a pre-ordained set of procedures to emulate

the question is.. how do I stop it   everything up