After you hit Ctrl+Alt+Delete and enter your username and password, you should be logged on within a minute or so, even at very busy times. If you find that it's taking longer than this, you can speed up your login by re-organising your folders.
Windows expects the majority of files and folders to be stored in these folders:
You can also save files and folders in other places, but that will slow down the logon time slightly and the more files you have outside these directories, the longer it will take to logon.
So to speed up your login time, try re-organising your folders so they are all within the directories listed above.