Hi, i am sure this problem has already been talked, but i can't find a post talking of it, so i post again in the hope someone can help me. After to have tried KAV 5.0, my system couldn't reboot, stucked at "saving settings", so hard reset needed. After the startup, all the PG protection option were disabled, and the program protection as shown in the screenshot. The program checksum however is fine and not empty. I can unfortunaly kill all of my previous protected program with APT Kill #1, so it isn't just a display bug. In fact i think i will simply remove my pgguard.dat and protect all my programs again :-/ EDIT : my pguarddat is still 42.5Ko, isn't there a way to restore it ?? EDIT2 : i have restored a previous backup of pguard.dat, and still the bug issue ??