help i need support . why my computer dont read important files.

You haven't given near enough information about what is happening to help.

1. What kind of files ("important isn't a type of file)?
2. What software and version are you using to try and open the files?
3. How are you trying to open these files (double-clicking, clicking on a link on a webpage...etc)?
4. What exactly happens or doesn't happen when you try?