Reason Core Security detects, blocks and removes harmful malware, adware and spyware. At the core, Real-time Protection prevents malware, adware and unwanted programs from sneaking onto your PC and Bundle Protection blocks unwelcome offers from being installed with software you download. It won't slow down your computer or consume unnecessary resources. With cloud-based scans you are always protected against the most recent threats. No longer are you required to do daily updates of massive database signatures that only protect you against known threats since the last update.