C:\ drive is an SSD but it takes over a minute for the machine to boot. Save As results in 'Working on it' and I will have completely finished this message before Speccy gets me a summary.

Something isn't right! The machine has decent specs, there are no viruses, plenty of headroom on C:\, I can't think of anything that might be causing the slowdown. Where do you start, anyone got any ideas?

CPU
Intel Core i9 9900K @ 3.60GHz 36 C
Coffee Lake 14nm Technology
RAM
32.0GB Dual-Channel Unknown @ 1069MHz (15-15-15-36)

Motherboard
ASUSTeK COMPUTER INC. ROG STRIX Z390-E GAMING (LGA1151)

Thanks - rev