registry location · risk: info
A file-type association
What lives here
Maps a file extension (like .txt or .pdf) to the program and actions that handle it.
What changing it does
Changes which app opens that file type, its icon, or its right-click actions. Usually harmless app plumbing — worth noting, not worrying.
Deciding whether to trust a file at all? Read the guide: Is this file safe to open?
Check a .reg file against this (and every other) risky location
Drop the file into the viewer — decoded and risk-flagged in your browser.
Open the .reg file viewer →