Based on my test regarding the "password is required" window pop-up during the launching the tib Acronis archive file, it seems like it's trying to use invalid or old version
Acronis True Image Backup Archive Explorer driver.
Definitely reinstalling the s/w should be a solution to fix the problem. But in this case, Acronis did not do a good job to clean up the old
Acronis True Image Backup Archive Explorer driver. If you reinstall or remove the Acronis True Image s/w, the Acronis True Image Backup Archive Explorer would be there without removed.
During the installation or reinstallation, you may see the below screen to get your new driver installation confirmation.
As many of you already know about this, this message is to get your confirmation to install new driver into your system. See the date published of this driver. Its version date is year 2007.
To check the current driver version that is already installed in your system, go to the
Device Manager (Control Panel -> System -> Hardware -> Device Manager), and expand the Acronis Devices. There should be one or more drivers installed.
If you see more than one driver, then check the individual driver version and remove the old drivers. If you have only one driver, then check the any updated driver is available or remove and reinstall the driver using the Acronis installation disk. By doing this, the "password is required" problem should be resolved.