A $#! file extension is related to the AOL virchk data format.
Software that open $#! file
$#! file extension - AOL virchk data
What is $#! file? How to open $#! files?
File type specification:
The $#! file extension is associated with applications developed by AOL Desktop and other apps developed by AOL (America Online).
The $#! file contains virchk data from AOL apps.
Seems to be obsolete.
This $#! file type entry was marked as obsolete and no longer supported file format.
This type of file is no longer actively used and is most likely obsolete. This is typically the case for system files in old operating systems, file types from long discontinued software, or previous versions of certain file types (like documents, projects etc.) that were replaced in higher versions of their original programs.
The default software associated to open $#! file:
Company or developer:
America Online, Inc.
AOL Desktop is Internet suite with Internet browser, instant messaging client, e-mail client and media player.
List of recommended software applications associated to the .$#! file extension
Recommended software programs are sorted by OS platform (Windows, macOS, Linux, iOS, Android etc.)
and possible program actions that can be done with the file: like open $#! file, edit $#! file, convert $#! file, view $#! file, play $#! file etc. (if exist software for corresponding action in File-Extensions.org's database).
Unspecified and all other actions for computer programs working with $#! file - AOL virchk data
Click on the software link for more information about AOL Desktop. AOL Desktop uses $#! file type for its internal purposes and/or also by different way than common edit or open file actions (eg. to install/execute/support an application itself, to store application or user data, configure program etc.).