I was trying out Shadow Defender (in shadow mode 24/7) with the following setup: OS: Windows Vista Home Premium SP2 Firewall: built-in Windows Vista firewall Real Time: 1. Sandboxie (paid) 2. SD (in shadow mode 24/7) 3. Prevx (free) Unfortunately, it didn't go well. My notebook hangs intermittently upon reboot - sometimes it happens, sometimes it doesn't. I still couldn't figure out what the conflict is. Anyone face similar problem? Any comment on the possible causes of conflicts?