"May Old Acquaintances Be Removed!"
You are not only one that collects and tries programs to see if you will like them, or if they will Magically change way you use your Puter. The New Year is best time I can think of to Clean House. Well, anytime is good but this is best excuse I can think of.
This may be oversimplified but let's bypass tech Speak. A couple of things happen when you install programs. First, they sit on your hard drive taking up space, and they have installed files to your "Registry". Also probably some DLL's (these are little files needed for Windows to make programs run) in your system.ini.
So what is a DLL? Dynamic Link Library file. These go in a Windows initializing file called "system.ini". INI for Initialization File. When Windows starts it looks at "system.ini to see what programs have to be available so they will start when you want to use them.
Windows also reads Registry to see what programs are on your Puter and what it has to do to make them work. OH, Windows also reads your Startup Folder to see what has to start automatically and hide in background. Also "msconfig" to place all these programs in your "Startup".
There are a lot more things happen but let's just look at these items to see how they effect your system. Yeah, I thought same thing. "I never use them and I have plenty of room on my hard drive so why bother removing them?"
Well, as all of this is happening and while you are looking at Windows logo, Windows is secretly loading all of it's mysterious Stuff and your mind is blank, Windows is applying all of this information to "System Resources" and slowing down operation of your Puter. Gosh, those folks at Microsoft are smart. Or is that sneaky? Either way, you don't have foggiest idea of what is hiding behind Windows Startup screen. You just know it is there for a long time with that little blue bar at bottom moving across screen.