HOW TO prevent Skype from auto-starting after Windows boots up

Once you install Skype, it will load on startup everytime. If you're low on memory, this will mean an extra app hogging resources even though you may not need it every time.

I found it annoying that the option to disable auto-startup doesn't appear until you sign in.

It's only after you log in that you see the checkbox option Start Skype when I start Windows checked by default (look under Tools | Options | General Settings). Uncheck this option to prevent Skype from auto-starting after Windows boots up.

Also see:

HOW TO speed up your PC