Speed Up.

I usually start with things that startup upon boot by right clicking on start, selecting task manager, then look at left side, and select startup apps. Any apps there I do not need running all the time, I disable them.
If you find these things is something you never use, I suggest to just uninstall them, and free up some cpu cycles, and hard drive space.

Then I look at the hard drive, go to it, then right click on it and select properties. Then select tools tab, then select optimism button. If it is a older spinner type I defrag it, if an SSD, I go ahead and hit optimism button, so as to make sure it is trimmed.
By the way, on the boot drive I highly suggest an SSD if you do not already have one.

I also bust open the case, and clean everything up. Bare min here, check your cooling fan, and heatsink, blow all the dust and dirt out and reapply thermal compound to the cpu. Heat can make your cpu throttle down, run slower, in an attempt to not overheat.

Then scan your PC for anything with your antivirus, and something like malwarebytes. Anything found can slow things drastically, and make your PC not fun to use at all.

Depending how knowledgeable you are, you can turn off services you do not use, to kill off some wasted cpu cycles. I will warn you, if you do not know what you are doing you can mess things up. I suggest doing a search for services you can safely turn off, and do a bit of studying before you do this.
To reach services, once again, right click the start button. select task manager, then select services on the left side. Then look at the upper right corner you will see "open service" tab/button. Hit it and services will open. Select the service you do not use, an example would be "print spooler". If you never use a printer, you can turn this off. to do this, select it, right click it, select properties, then under startup type, select disable to stop it all together or manual if you might use it some times. This will stop it from starting at boot.

Of course there is always, tweaking the settings in your bios if you want to overclock your cpu or your ram. Providing your PC has those capabilities. KNOW what your doing here, or you can damage your PC.
Beyond that comes spending money on upgrades, like faster CPU, more Ram, Adding a GPU, yes a video card can take some of the labor off your CPU to free up some power.

Then lastly. A fresh install of the OS seems to freshen up a PC's speediness. Just having everything installed new always seems to help, but don't expect miracles from this unless your OS was really messed up to begin with.

This is some of the things I do to every PC I build, or work on. Tweaked for it specific purpose.
This sounds like a lot of work, and well, it can be. You can get a lot of hours in one tweaking it. But when finished it works at its best, and can return some good results.

 

1) update bios
2) back up files you need and clean install from iso
3) install every windows update,even the optional ones then manually check for even newer versions of your drivers (like chipset, network, rapid storage, graphics
4) autoruns is your friend, run as admin and clean startup, scheduled tasks, services you dont need
5) this pc, properties, advanced system settings, performance settings, click on custom, disable fade/slide, peek, animate occording to your taste. ( i usually keep smooth scroll, thumbnails, windows content, smooth edges on and disable the rest)
6) settings, privacy, background apps, dont let apps run in background (or just allow store and windows security, disable the rest)