My motherboard is a MSI Z270-A Pro,
The Processor is an i7-7700K,
As mentioned in my original post, I am having issues with mouse clicks not being detected occasionally for a few seconds at a time. I have ruled out a hardware issue with the mouse through trying with 3 different mouses which work perfectly otherwise. I have also ruled out a USB port issue by trying on multiple ports. I therefore think the problem is with either the new CPU I have installed or the new Motherboard I installed at the same time. I am trying to update drivers on both to see if that helps my problem.
Please let me know if you need any more info,