I have two similar blue VGA ports on my PC but only one works with the cable to the VGA port on the monitor. I do not know what the other is although the VGA connector fits into it.but nothing happens - could be for dual monitors?
I have DVI on the monitor but to my knowledge not on the PC.
sounds like the card only has only a single monitor output connection on it which is vga, and the 2nd vga connection is probably orientated in a different direction and is the one connected to the motherboard, this second one will be disabled when the card is installed and why it doesn't work at the moment but when no card is installed it would be the connection for the monitor.
I think you are suggesting I get an adapter so I can plug a DVI cable from the monitor to the PC.
no, you do not need one, what i was saying is IF you did use one then it also would need to be replaced just to rule that out as a problem.
Right now, since I cleared out the insall2 NVidea folder, and installed the latest driver, there is no flickering.
great news.
I will Google those adapters to find the one I need and order one with a cable if the flickering returns. I was anxious to fiddle with the card but am confident I can do it if necessary.
Changing from VGA to DVI is a good option and thanks a lot. I think the install2 folder was too full and NVidea needed a thorough cleaning.
don't bother you don't need one.
you only need an adaptor when you having connection conflicts. eg. if your pc only uses dvi connections and you monitor only has a vga connection, in that case you would need a dvi to vga adaptor or cable.
now everything is working great "DO NOT UPDATE DRIVERS" remember the old rule if it's not broken don't fix it!!!
What card do you prefer, for future reference?.
personally i like nvidia cards but that is only because they have a better reputation for working linux drivers, on a windows pc any card would do, nvidia or ati/amd depending on what games you played, some games work better with amd cards and some work better with nvidia but for non gamers any brand card will do and just buy the best your budget allowed.

had a thought and realised windows 10 might update your graphics drivers, so you may need to stop it doing so. info on how is in below links.
http://www.makeuseof.com/tag/take-back-control-driver-updates-windows-10/
http://www.howtogeek.com/223864/how-to-uninstall-and-block-updates-and-drivers-on-windows-10/
http://winsupersite.com/windows-10/stop-automatic-driver-updates-windows-10
http://www.tenforums.com/tutorials/8013-windows-update-automatic-updates-enable-disable-windows-10-a.html