Did you try a forum search as there are more hits than you can shake a stick at ?
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- Detections in Memory -
By doing a Custom scan in which you have elected to scan Memory and that all these detections are in memory. Since they aren't physical files they can't be moved to the chest, deleted, etc. so there is no action that can be taken, hence the Apply button being greyed out.
The detections in memory are frequently other security applications loading unencrypted virus signatures into memory. Having set off a scan of memory by an antivirus application looking for virus signatures, don't be too surprised if it finds some in memory.
