How to fix specific files not working or opening

Step 1-Restart Your Computer:

Step 2 - Check File Extension:

Step 3- Verify Software Installation: 

Step 4- Try  Different Programs that best uits your file 

Step 5- Check File Corruption:

Step 6- Run as Administrator (for applications): Right-click the application icon and select "Run as administrator" to see if it's a permissions issue.