IDP is Intrusion Detection Protection, so without information (a screenshot might have helped) it is hard to say if this is a file or an internet location.
That said I can't see this taking more than two hours.
Are you able to open the Avast Virus Chest using the avast Tray Icon right click option ?
If so can you see what it was ?
You may have little in the way of options but to restart the system.
Before you do that you could try pausing the virus shields from the tray icon and restarting them and see if that has any effect.
