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I am now operating on a huge magnified screen, can't get it back to normal. But at least I can see your posts. This has been really scary. I couldn't get rid of the MS Tool removal to access anything at all, according to them I had Trojans and 38 viruses, unless I bought the anti-virus system it looked as though I was stuck forever.
I've been pressing ctrl/esc to get the start menu and managed to do a system restore
but it is still not the same. Can't find the programme responsible to remove it. Downloaded the free malwarebytes now, thank you Karen hopefully it will right itself. Not quite blind yet but I would like to know if I can restore the screen to normal size. Thank you all for your help atm.