Excel error window: file cannot be accessed.

Hello everyone.
I`m using Win 7 and ms Office 2007. I saved some Excel files on my pc (.xls). It worked, everything was ok until now. Today I can`t open it. It is became corrupted somehow and i`m in a deep upset. An error message appeared: .xls file cannot be accessed. The file may be read-only or you may be trying to access a read-only location, or the server the doc is stored on may not be responding. I'm searching a quick but effective method to fix this problem. Is there anyone who can help me?

Advise

At first make sure that your files are really read-only. You can see it in Properties - the Attribute setting.

You can try open it in WordPad, OpenOffice and another similar program. If it works, then you save the data from your file. Not bad result.

If this doesn`t work then try to fix it with help of software, such as Recovery Toolbox for Excel https://excel.recoverytoolbox.com/