Soldato
I have reinstalled since I posted in this thread all that time ago. This being due to a new GPU which kept giving me frozen screen. I thought it was corruption so did a clean install. The problem still happened. I have never resolved it but I think it's something to do with the Samsung TV I'm using and 4k. It only freezes if I switch off the TV, leave the PC on, come back and power up the TV and I get a frozen screen. I can connect via TV and still use the PC. If I access device manager and reinstall the driver, the screen starts responding again of if I change the refresh rate from 60 hertz to 30 hertz but this looks nastier.