Open Command Prompt
Use the `cd` command to go to the file’s folder
Type `start filename.ext` and press Enter
Type `notepad filename.txt` and press Enter for text files
Type `start “” “C:fullpathtofile.ext”` and press Enter
Type `explorer “C:fullpathtofile.ext”` and press Enter
Type `cmd /c start “” “C:fullpathtofile.ext”` and press Enter