Hi, I suggest you to follow the other suggestions(
@FireShootSK ,
@frogboy ), because they're very good, and, in addition, I want to suggest you to install BitDefender 60 Second Virus Scanner, which is a very quick and efficient scanner and it runs in background, so it doesn't slow down the PC!
Then, you can also install Collusion extension which allows you to know which websites are tracking you, and this is very important.
So, you can install also Auslogics Disk Defrag, which can improve the speed of your PC with the defragmentation, and in addition I suggest you to install also PrivaZer and MPC-HC, which is a very fast and good media-player.
Thanks for sharing your configuration