Files that contain the .install_backup file extension are most commonly used by the AVG anti-virus software application. AVG is a free and upgradable anti-virus software that can be used on Windows, Mac and Linux operating systems. The program was designed to protect a user's computer from viruses and other malware and spyware threats.
The AVG software application uses the .install_backup file extension for AVG shell extension module files. If something goes wrong with the installation process or the AVG installation, the .install_backup file can be used to restore the user's system. This file is normally saved under the name avgse.dll.install_backup.
Unfortunately we have not received enough suggestions for software that can open INSTALL_BACKUP files yet.
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If you have additional information about the INSTALL_BACKUP file format or software that uses files with the INSTALL_BACKUP suffix, please do get in touch - we would love hearing from you.