Vir extension is related to Virüs infected files. You should make right click then select change the name option.

When an antivirus software finds an infected files, it changes the file extensions for protecting the computer and defusing viruses.
For example: It prevents files function in "program.exe.vir" form instead of "program.exe". When you change the extension, the software works but virus spreads. It is better to delete this file. Then you may download an antivirus software to clear viruses. 

There are some softwares that use this method:
-Symantec Norton AntiVirus
-Avira AntiVir

What to use vir

Make right click > change the name if antivirus allows it

which page related to vir file

-No link-

vir Related Searches

You can check related links about vir fileextension.