I tried "scan local drives" from the menu, made sure that nothing else was running (including stopping TimeMachine) and left it overnight. When I woke up and woke up the mac, the beachball was spinning, and I could not switch to any other program. I can't force quit, and after clicking in a few places, even the beachball cursor has disappeared. What can I do? It didn't report any threats, and it doesn't appear to have scanned much. This is a big problem. Is this a common problem? Is there a fix? I have an early 2007 MacBookPro Core2Duo with 3GB RAM.
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