Many of you have been away for awhile. Often, a long while. That's fine, but it can cause problems when you first start up your computer.
I&TS and Microsoft are always pushing out updates to Windows and to other software. If your computer has been shut off, these have not been installed. So when you log on, it may take a very long time before you can use the computer as the many updates are put onto your computer all at once.
Eventually, all updates will be added and things will run smoothly. However, it sometimes takes several logons to install everything (one update will require another one be installed first, for instance).
If you're patient, eventually everything will be set. One way to reduce the issue is to leave your computer on (but not logged in) when you leave for the day. That will allow software to be installed overnight.
Sorry for the inconvenience, but it's necessary to keep your computer up-to-date.