If you can recognize a folder or file that is like to be infected with a virus, you can delete it without opening it and it will not infect your computer. The following instructions will adjust the settings on your computer so file extensions for known file type are displayed, therefore you can recognize and avoid opening potentially infected files.
Files with two extensions, for instance, document.text.exe or pictures.jpg.exe are probably not legitimate files. Seldom, if ever, does a safe file have two extensions.
Also be aware of regular files that appear to be legitimate, (.txt), or image (.jpg, .gif, .png). To avoid viruses It is best to know the source of the files you open.
Use the following instructions to have the file extensions displayed:
Open My computer or any other file.
Click Tools on the menu bar.
If the menu bar is not displayed, press the Alt key and the menu bar will be displayed.
Figure : Tools on the menu bar
Click Folder options....
Figure : Tools menu
In Folder Options click View, and then in the Advanced settings box, remove the check from Hide extensions for known file types.
Figure : Folder Options