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By default, WinRAR will only associate files with extenions RAR, R00, R01 till R29, how about the rest?

WinRAR switches to new name scheme for quite some time, which use part1.rar, part2.rar etc. as extensions. However, you can find lots of files, still compressed using the old name, extensions from R00 to R99(then S00 to S99 and so on).

By default, WinRAR will only associate till R29 and left the rest as “unknown file type”. Here is the simple tip to solve this issue and let RAR handle them all.

To do this, just open a command prompt and type

for /L %d in (30,1,99) do assoc .r%d=WinRAR

This will associate R30, R31 till R99 with WinRAR.

If you are using Vista, you need to do this from an elevated command prompt, refer to my earlier post for more info.