My sister's computer runs on a Pentium processor. Not sure if it's the 4 or what, but it is older as it came with Windows 7 64-bit and a Legacy BIOS. My system has the AMD E2 VISION processor that came with Windows 7 64-bit with a Legacy BIOS.
Mine was released in 2011 - 2012.
OK.... so backed up all files to external HDD and have done a 'clean' install of win10... hoping this will solve some issues... and display driver is now not reporting errors... should have done that from the outset... but see how we go