Hi sunny staines
I have used three of these (in fact the others I have never heard of)
Autoruns - OK till I discovered Winpatrol - much more useful.
Auslogics Reg defrag - still on the system coz I am not over happy with the beta version of 10bit Smart Defrag.
Local Cooling - Recommended by Click (BBC News24) - unimpressed and removed.
The rest - complete unknowns to me.