Dads, google Glary Utilities
Free download, solid set of puter utilities that includes fixing registry errors, cleaning up temp files, fixing bad shortcuts, etc.
And much much more.
It is actually 2 sets in one package. Once installed, under 1 click maintanance, check all the boxes, and scan for problems, fix problems, then rescan again and again until you get a scan with no problems.
Then, move a tab to the right,Modules, Optimise and improve, startup manager.
Take a LONG hard look at whats starting when windows does and why.
Do I really need " " this to start every time windows starts?
Plus it has a built in google link, so you can find out whats what.
Once that is done, reboot, and see how many processes you have running.
There is a process manager that is a bit better than the default windows one in "system tools" and like the windows start manager you should be able to google any entry to see if it can be disabled or should be left alone.
This is a sweet set of tools that will fix many many problems especially with older systems that have not been cleaned out for years.
BTW I highly recommend a complete Hard drive wipe, repartition, and reinstall OS/Drivers/Software at least once a year if you want a truly clean fast running machine.