OMG what a nightmare that was!!
Ok, situation is, I have managed to succesfully install 258.96 WHQL...and all seems stable at the moment.
Going to try and run FSX in a moment..because if anything can show up a Display problem..FSX can!!
I had serious thoughts that my Graphics Card was Kaput!....half the problem, was I couldnt uninstall the 260.89 drivers from within Add/Remove...So, I reinstalled them...rebooted into Safe mode, then uninstalled!..that worked...the next issue, was that Win7 auto installs it's own Drivers...this also caused problems with a garbled display!...so, back to safe mode, uninstall the Card itself...rebooted back into safe mode...looked in device manager, and instead of a Nvidia driver, it had installed the standard VGA adaptor...Cool
So, still in safe mode, I installed 258.96...and voila..I'm typing this!!
Im scared stiff now about reinstalling Nvidia drivers....so, if anyone can post the exact sequence..I would be very grateful!
Ok, fire up FSX...and see what happens!....wish me luck, I'm going in!!