Good to hear, Graham. It staggers me that Microsoft still do not understand the correct default settings for their own operating system after nearly 30 years.
Also, install CLASSIC SHELL from here:
Download Classic Shell for free. Start menu and Windows enhancement software. Classic Shell adds some missing features to Windows 7, 8, 8.1 and Vista like a classic start menu, toolbar for Explorer and others. Note: The software available here is not the latest version.
sourceforge.net
It allows you to access most of the classic Windows shell features and access methods instead of the mess from Microsoft from Vista onwards, including Control Panel.
All the original code is still there in Windows 10, just that Microsoft locks us out of it in favour of their twee cryptogram driven garbage in both Windows and Office.
I still use Office 2003 Pro, as I consider it to be the last stable version of Office! I own an unlimited licence OEM copy. It works perfectly under Windows 10 Pro 64 ...
BTW, your monitor (actually, graphics card ... ) may need calibrating at that age. If it cannot be properly calibrated, that's when it needs to be replaced and recycled.