HFNetChk was a utility created by Shavlik Technologies (now Ivanti ) for managing security hotfixes, it included a catalog used to track security updates for multiple Microsoft products.
For current OS's - use Windows Update and Microsoft Baseline Security Analyzer instead.
“When all the world is young, lad, / And all the trees are green / And every goose a swan, lad / And every lass a queen / Then hey for boot and horse, lad, / And round the world away / Young blood must have its course, lad, / And every dog his day” - Charles Kingsley
Get-Hotfix - Get the hotfixes that have been applied to the local and remote computers. (PowerShell)