If you connect to your office LAN from your home office you probably have a VPN Client. The VPN Client logs you into the office LAN with a password. As part of its duty to prevent office data from leaking to the Internet, the VPN Client blocks access to your home office LAN. The once-a-day desktop icon cleanup senses the inability of these desktop icons to reach their destinations, so it deletes them. I then laboriously put them back. My printer is reached through a link in the Active Directory. So I cannot print whilst connected to the office LAN. Naturally, all of this happens without so much as a "How do you do?"