Vulnerability Protection Signatures corrupted...

Hi, all. Newbie here. (Brace yourselves.)

I've read the other threads on this, and they haven't helped. This is happening almost every day now, sometimes twice, so Help!

It's happening randoml - it just happened again- randomly, not just when I restart. NIS 4, Mac 10.4.11, eMac 1.25 USB 2.0.

Thanks. Have to update and restart again now...