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.

CRDOWNLOAD files are temporary files created by Chrome when you download a file from any Chromium-based browser. Learn how to open it.

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.

When you get a zip file, all you need to do is open it up with Windows 7 and it'll automatically let you access its contents. We'll walk you through the steps in our video.

7-zip has finally added support for the long-requested 'Mark-of-the-Web' Windows security feature, providing better protection from malicious downloaded files.