I deactivated and reactivated the shield and seems to have been solved.
http://8658aaed-a-62cb3a1a-s-sites.googlegroups.com/site/gasyyn4/imagenalia/ScreenShot_20170719024737.png?attachauth=ANoY7coE9mHwRenbsAnq3hNMHbyBAJGFSS2zjSvcYvgq2Yr92rx-3S6BQKO_OG23E_ku3QBrEphSdsztrccWi9y7ZDlFOkKqsqeVuFsth1uopE6s4Y_pKTjswPDsFWU4TWGzj78FyXGiEInUA_ht6P2Y91oXB_eMBRClhffddFBLx7a9991gYEIVirq6pPkO5p2Wsfs1TcVYS3psTgPhTChWbS7tO1Kfk7b6qhdFPBKv9z9DtxZYaVUL5OcybBnXaFt5Yh1QZuLK&attredirects=0
My question is, how should I configure this shield? What folders should I protect without risk of slowing down my pc?