1. The free version has just one GUI: the simple one.
2. The older version (3.0.519.1) failed the latest February Virus Bulletin test under Windows NT, because of a highly debatable virus sample- in fact other AV makers have objected its usage for the test.
That said, I believe Avast is certainly the best freeware antivirus that exists by far.
The revolution cannot be a lever, or an essay, or tablaeu, or embroidery. It cannot proceed mellowly, piece-by-piece, gently, devoutly, simply and humbly.
Mao Zedong