Notepad2 is a free download that's very small entirely free and has more functions than the notepad that comes with Windows.
Here's how to add it. Download it from your favorite Download site and unzip it to your desktop.
Change the name from Notepad2 to Notepad.
Now a little warning. You are about to mess with system files, so be careful. Don't do it if you're not comfortable.
Open up My computer and then the hard drive where Windows is installed.
Go to tools then folder options and fide the setting called Hide protected operating systems and uncheck it.
Now go to the windows directory to system 32 directory and rename notepad.exe to notepadx.exe.
That way you still have the old notepad if you need it. However Windows will automatically restore it's original notepad if you just copy in the new one. We can prevent that.
Now go into dllcache.
Copy the notepad you renamed on the desktop into that folder.
That replaces the copy of notepad that Windows restores form.
Go back up to the system 32 directory
Copy the notepad from the dektop into that directory too.
Press cancel on the dialog box.
If you're worried about seeing hidden files, you can go back into the tools section and recheck Hide hidden system folders.
Shout out to Omar Shahine who runs the blog where I found Shakeel Mahatel's method for doing this. It takes a village.