I use 7-Zip. Use the password encryption for zipped folders. One thing I don't like is when extracting a zipped folder and opening a file it copies that file to a temp directory. I have to then Securely delete that file. It's free and open source which is good.
I use a RAM disk for temporary directory and more, so no need to worry about that. Or you can use full disk encryption, which I also have.
I do have it installed & use it sometimes but my fav has always been WinRar. 7-Zip nice, light,quick & free WinRar as above but a paid app WinZip getting way too bloated with useless options & gimmicks