When i download a part i could not open it and the name is something.rar and i can't open it with SW?

This brings up a great question. Why use Win-Rar to zip the files and not just use the zip utility built into Windows and it’s the same utility that SolidWorks uses for Pack and Go. I don’t like loading unnecessary programs that do the same that I already have.
Can someone explain if there is a benefit to using Win-Rar for this?

  1. Step 1:

    Right click on the file or folder containing the files you would like to compress into a "Zippped" folder. Choose Send To, then Compressed (zipped folder). Done