Change Skype so that it does not start every time you start your computer. Encourage users to QUIT Skype when not using it. You could use Autoruns to more thoroughly control what is in startup.
https://technet.microsoft.com/en-ca/sysinternals/bb963902.aspx?f=255&MSPPError=-2147217396
Autoruns has been around for decades. An excellent program that gives you complete control of what is in startup. It may amaze you to see.
There are a bunch of programs that are serious resource hogs and contribute to slow start ups. Here are the ones on my hit list:
- Garmin Express
- Roxio anything
- Skype
- uTorrent
- Frostwire
- Trusteer
- Dropbox
- Onenote
- Evernote
- All Apple products
- Quickbooks
- Spotify
- Pandora
- AOL desktop
- Some games, particularly online ones