(where XX varies by version: 12, 14, 15, 16, etc.)
hxcore.ol is a harmless, often essential Microsoft Outlook component for users who sync Outlook.com or Hotmail accounts with older versions of Outlook. It is not a virus, but like any system file, it can be spoofed by malware. Always verify its digital signature and location before taking action.
While "hxcore.ol" doesn't appear to be a standard term for a specific article type, it likely refers to a combination of technical components or shorthand: for Heat Exchangers, Core for central systems (like Helix Core), and .ol as a common file extension or shorthand for "online" or "Outlook."
Example of what you might find: