I've recently noticed that my Custom Scan ("Full System Scan") is now taking an excessive amount of time to complete. I use a wake up mechanism to wake my laptop at a specific time to start the scan on a weekly basis. The wake up software keeps my laptop up for 3 hours and then hibernates. This used to be sufficient to complete the scan. The scan now takes 18+ hours to scan 1,428,248 items. Any ideas what could be causing the excessive scan time?