If you are running a Vista computer, it is probably 10 years old and it is time to upgrade to a nice new Windows 10 computer
The biggest visual change I have seen for the average person is a menu change in the Settings and Windows Defender Security Center.
Over time your computer builds up a lot of junk. You know this. you download some program and use it once, your web browser keeps a history of every site you visit (ah-oh?), and other programs keep temp files too.