So, when you attempt to open such files using freeware utilities like 7-Zip, you may encounter an error, saying Cannot open file as archive. Let us see what you can do about it.

If you cannot open an Excel file and see Excel cannot open the file because the file format or extension is not valid error, see this post.

The ability to install or reinstall Windows is important when formatting a new hard drive or fixing a corrupt operating system. When the message "Windows cannot open the required file D:\Sources ...