.H1Q File Extension
Microsoft Help Merged Query Index File
3.0 | 2 Votes
What is an H1Q file?
Query index used by Microsoft Help, a system help program included with the Windows operating system; stored in the "\Documents and Settings\All Users\Application Data\Microsoft Help" in Windows XP and the "\ProgramData\Microsoft\Assistance\Client\1.0\en-US" directory in Windows Vista.