DISABLE "SEARCH LAN". I am having a similar problem with older HP AIO printers. Model C7280 AIO Network Attached (Wi-Fi or Ethernet, but no problem with USB connection) on the same network as any Windows 7 64bit Professional installation of BT Sync Client (version 1.4.103 Beta) with the "Search LAN" function enabled on any folder (turning off "Search LAN" on all clients and folders seems to reduce or eliminate the problem - took many hours to track this down). The condition renders the printer(s) inoperable (power cycle clears, but only for a minute or two), and generally causes people and techs to fault / replace the HP printer(s). The HP AIO printer error condition is flashing lights and a flash of error code B850B5C8.
