I have recently updated to Windows 10 on a fairly old machine - generally with no problem.
However, I am having a few issues with the screen - especially when I use a second montitor.
1) In general the screen is very dull and I can not make it brighter (I can change the slider but it does nothing).
2) When I have a second monitor it works - but if I am working on a powerpoint presentation on the second screen, then start slide show, when i leave the slide show it puts me back using the laptop screen (which is very dark). So I have to go and change the settings so only the second screeen is used. I have updated the driver settings (going through device settings/display adaptors/Intel (R)HD then update settings) - but nothing happened.