.CRL file extension

The program works with the following extensions: gif, zip, jpg, wmf, bmp, png, jpeg, tif, jpe, udl, url, ivf, p7r, crd, cat, p7s, cer, tvp, cnf, prf, crl, qds, rat, cdf, crt, shb, uea, der, shs, dib, sst, dun, stl, emf, jfif, tiff, crds, ueaf, theme, msstyles, appref-ms and slupkg-ms

Belarc Advisor is a tool that can analyze your computer.