ISZ File Extension

ISZ file icon
Zipped ISO Disk Image

What is ISZ file?

ISZ file is a compressed disk image file. The format was created by EZB Systems. ISZ format is nothing more than a compressed ISO image.

Similiarites with ISO file format

ISZ format follows closely the ISO format standard, and uses compression to achieve smaller file sizes that help to save disk space. ISZ format uses ZLIB and BZIP2 compression methods, a lossless compression algorithms that retain file metadata. ISZ format also offers password protection and encryption: AES128, AES192 or AES256 (128-bit, 192-bit and 256-bit key encryption, respectively).

Splitting large files

Large ISZ files can be split into smaller parts. Each such part retains name of the original file, but starting from second part the extension is different – first part has ISZ extension, second i01, third i02, and so forth. Splitting files into smaller fragments allow users to store data on multiple storage devices and combine the parts into the original files when needed.

Programs which support ISZ file extension

The following listing features ISZ-compatible programs. Files with ISZ extension, just like any other file formats, can be found on any operating system. The files in question may be transferred to other devices, be it mobile or stationary, yet not all systems may be capable of properly handling such files.

Programs that support ISZ file

Updated: 01/10/2020

How to open file with ISZ extension?

Being unable to open files with ISZ extension can be have various origins. On the bright side, the most encountered issues pertaining to Zipped ISO Disk Image files aren’t complex. In most cases they can be addressed swiftly and effectively without assistance from a specialist. The following is a list of guidelines that will help you identify and solve file-related problems.

Step 1. Get the UltraISO

The main and most frequent cause precluding users form opening ISZ files is that no program that can handle ISZ files is installed on user’s system. This one is an easy one. Select UltraISO or one of the recommended programs (for example, DAEMON Tools, Alcohol 120%, WinMount) and download it from appropriate source and install on your system. Above you will find a complete listing of programs that support ISZ files, classified according to system platforms for which they are available. The safest method of downloading UltraISO installed is by going to developer’s website (EZB Systems, Inc.) and downloading the software using provided links.

Step 2. Update UltraISO to the latest version

You still cannot access ISZ files although UltraISO is installed on your system? Make sure that the software is up to date. Software developers may implement support for more modern file formats in updated versions of their products. The reason that UltraISO cannot handle files with ISZ may be that the software is outdated. The latest version of UltraISO should support all file formats that where compatible with older versions of the software.

Step 3. Set the default application to open ISZ files to UltraISO

If you have the latest version of UltraISO installed and the problem persists, select it as the default program to be used to manage ISZ on your device. The process of associating file formats with default application may differ in details depending on platform, but the basic procedure is very similar.

The procedure to change the default program in Windows

  • Clicking the ISZ with right mouse button will bring a menu from which you should select the Open with option
  • Select Choose another app → More apps
  • Finally select Look for another app on this PC, point to the folder where UltraISO is installed, check the Always use this app to open ISZ files box and conform your selection by clicking OK button

The procedure to change the default program in Mac OS

  • By clicking right mouse button on the selected ISZ file open the file menu and choose Information
  • Open the Open with section by clicking its name
  • From the list choose the appropriate program and confirm by clicking Change for all....
  • Finally, a This change will be applied to all files with ISZ extension message should pop-up. Click Continue button in order to confirm your choice.

Step 4. Verify that the ISZ is not faulty

You closely followed the steps listed in points 1-3, but the problem is still present? You should check whether the file is a proper ISZ file. Being unable to access the file can be related to various issues.

1. Verify that the ISZ in question is not infected with a computer virus

If the file is infected, the malware that resides in the ISZ file hinders attempts to open it. It is advised to scan the system for viruses and malware as soon as possible or use an online antivirus scanner. ISZ file is infected with malware? Follow the steps suggested by your antivirus software.

2. Ensure the file with ISZ extension is complete and error-free

If you obtained the problematic ISZ file from a third party, ask them to supply you with another copy. It is possible that the file has not been properly copied to a data storage and is incomplete and therefore cannot be opened. When downloading the file with ISZ extension from the internet an error may occurred resulting in incomplete file. Try downloading the file again.

3. Ensure that you have appropriate access rights

Sometimes in order to access files user need to have administrative privileges. Log out of your current account and log in to an account with sufficient access privileges. Then open the Zipped ISO Disk Image file.

4. Verify that your device fulfills the requirements to be able to open UltraISO

The operating systems may note enough free resources to run the application that support ISZ files. Close all running programs and try opening the ISZ file.

5. Ensure that you have the latest drivers and system updates and patches installed

Regularly updated system, drivers, and programs keep your computer secure. This may also prevent problems with Zipped ISO Disk Image files. It is possible that one of the available system or driver updates may solve the problems with ISZ files affecting older versions of given software.

Do you want to help?

If you have additional information about the ISZ file, we will be grateful if you share it with our users. To do this, use the form here and send us your information on ISZ file.

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