If 7-Zip cannot open an archive or compressed file and you see Cannot open file as archive error message, here's what you can do.

While Windows does have some built-in support for file compression, it's pretty limited, and definitely not enough even for a slightly more advanced user. You don't have to be doing rocket surgery or ...

To open an IMG file and view the contents in Windows 7, you need a third-party file extraction program such as WinRar or 7-Zip.

Open-source might not be the first thing you think of with Windows, but these free tools can seriously boost your productivity.