Hi Everyone that replied to me. I've solved the problem now. I clicked on the Help on the page for Screen Saver Settings and Display Settings etc. It brought me a panel to put my problem into, and that brought various things back to go to. I think I saw a Chat on that page and it had Telephone Us as well, or you could arrange a phone call. I clicked on the chat and a panel popped up with someone to ask me what my problem was. I explained all the details with typing, as above and he got me to open the Run and put some letters in there and it brought the Problem Detector, or Trouble Shooter up. I can't remember what I had to put in now, but he said to see if it asked for a passkey, after it had run along with a blue line. I told him it did, there was the strip there saying to enter the passkey, which of course I didn't know.
He gave me my passkey, about a dozen numbers, don't know where from, I think he was to do with Microsoft I had to put it in again as it said to verify the number and try again, though, I thought I'd put it in right. It worked the second time. It took me to the panel again saying that I needed to restart my comp to install drivers and updates. This guy had asked me if there was anything that had got spoiled in my updates, but I said my comp man had done a recovery with those so they should be OK. It had the option to do this right away or stay to continue with the trouble shoot, but you had to put in what device you were having a problem with.
The tech man said to choose to stay as I said I didn't know how to get back to the Trouble Shooter or to him if I restarted my comp. He said he'd send me the links and the 'assist no' or whatever it's called in an email, and I could try them if restarting didn't work. He'd said in the beginning that this Trouble Shoot (which I've seen before when my comp's stopped working sometimes) usually worked 90% of the time.
Anyway, after we'd finished and I'd thanked him for his time and trying to help me, which he apologised for not getting right to the problem, I closed all the windows and decided to restart my comp first, after I'd checked and seen his email he'd sent me, which I'm saving as it has useful links on it. It was from the Answer Help Desk. When I'd restarted my comp, I went to the Screen saver page by right-clicking, I think it is, on the screen and clicked, Screen Saver Settings, expecting to hear the loud noise and the panel coming up again, but it was very quiet, and Lo and Behold a separate window opened with the display screen on it with my photos going round! I never felt more relieved! Good on that man, no thanks to my computer man! I have used him for a lot of years though, and he built this comp that I'm using now. Don't know if it installed new drivers and did updates, but it must have done, and maybe that's what was needed with the new monitor added. My comp man put the software on with a disc, so surely all that should have been there, but he should have known what to do anyway, instead of just leaving me with it! I don't know how he could say that he didn't know how to fix it if he's got 40yrs experience!
Don't know what this passkey was about, unless it's to do with my Microsoft account. I used to have a password for the Windows 10 screen which was put on after W10 was installed. Good job the password I used worked or I'd have been stuck! My comp man took the password option away after I asked him if I needed to have it, but it was a good safeguard. Now the picture just goes away to my Desk Top but was wondering if this had something to do with it. I've never used the Log On system in the Start menu over the years of using the computer. Glad it's fixed now though. Thanks for the suggestions. I'd like to thank that Tech man but it's an automated email but has the Ticket number we were using as he did say that I could answer him .I'd like to let him know.
I've found out how to move around that monitor menu. You just move along the buttons. I put the brightness of my screen down to 65% as it was at 100%, and the Contrast, but it doesn't seem to look any different. There's supposed to be a colour adjustment I think but I can't find it. To go into The Next Menu, it just seems to mean that list that it's showing, to move up and down it. Mine's an LG monitor, by the way, 21 cms. I've moved up from a 17 cm. The screen looks a bit hazy with the largeness, but quite panoramic. All for now then. Thanks again for input.