C:\ProgramData\AVAST Software\Avast\ng\Logs
Check this log here and paste content (ngtool.log). Is it still running with high CPU usage?
Still using high CPU. Here' s the log you requested. I'm uninstalling as per above instructions until fixed - which I hope is soon!
21.10.2014 16:36:13.335 5976 | error: Trusted parent needed for the command.
21.10.2014 16:37:04.550 1592 | error: CLSID_SessionAsw creation failed, error: 0x80040154
21.10.2014 16:38:05.244 1592 | error: CLSID_SessionAsw creation failed, error: 0x80040154
21.10.2014 16:39:05.239 1592 | error: CLSID_SessionAsw creation failed, error: 0x80040154
21.10.2014 16:39:05.758 4192 | error: CLSID_SessionAsw creation failed, error: 0x80040154
21.10.2014 16:39:05.761 4192 | error: InitializeVboxClient failed, error: 0x80040154
21.10.2014 16:39:05.847 4192 | error: TypeLib(Un)Register C:\Program Files\AVAST Software\Avast\ng\vbox\VBoxC.dll, error 0x8002801c
21.10.2014 16:39:05.863 4192 | CmdAvastUninstallWrapper done
21.10.2014 16:39:07.747 4192 | Installing VirtualBox...
21.10.2014 16:40:03.012 4192 | Creating snapshot...
21.10.2014 16:41:03.783 4192 | Volume shadow set: {069ffc82-e81a-411f-b4c1-77bfaa6340b5}
21.10.2014 16:41:03.803 4192 | BCD volume: \\?\GLOBALROOT\Device\HarddiskVolumeShadowCopy17
21.10.2014 16:41:03.803 4192 | Windows volume: \\?\GLOBALROOT\Device\HarddiskVolumeShadowCopy18
21.10.2014 16:41:03.803 4192 | Creating new hive files...
21.10.2014 16:43:28.199 4192 | Cloning NTFS volumes...
22.10.2014 04:00:49.023 4192 | Creating a new VM machine...
22.10.2014 04:00:53.884 4192 | Starting VM machine to create initial snapshot, it can take a couple of minutes...
22.10.2014 05:16:01.191 4192 | error: PrepareNGSource failed, error: 0x800705b4
22.10.2014 05:16:01.314 4192 | CmdAvastInstallWrapper done (result: 0x800705b4)
22.10.2014 05:16:01.315 4192 | CmdAvastReinstallWrapper done (result: 0x800705b4)
22.10.2014 05:17:06.865 6956 | Starting VM machine to create initial snapshot, it can take a couple of minutes...
22.10.2014 06:32:11.355 6956 | error: PrepareNGSource failed, error: 0x800705b4
22.10.2014 06:32:11.382 6956 | CmdAvastRepairWrapper done (result: 0x800705b4)
22.10.2014 06:33:06.339 5104 | Installing VirtualBox...
22.10.2014 06:33:09.317 5104 | Creating snapshot...
22.10.2014 06:33:51.994 5104 | Volume shadow set: {240cb177-4724-41e2-8702-5a5c998c8154}
22.10.2014 06:33:51.996 5104 | BCD volume: \\?\GLOBALROOT\Device\HarddiskVolumeShadowCopy19
22.10.2014 06:33:51.998 5104 | Windows volume: \\?\GLOBALROOT\Device\HarddiskVolumeShadowCopy20
22.10.2014 06:33:52.000 5104 | Creating new hive files...
22.10.2014 06:36:27.982 5104 | Cloning NTFS volumes...
22.10.2014 06:39:41.392 5104 | Creating a new VM machine...
22.10.2014 06:39:44.378 5104 | Starting VM machine to create initial snapshot, it can take a couple of minutes...
22.10.2014 10:13:04.954 5104 | error: PrepareNGSource failed, error: 0x800705b4
22.10.2014 10:13:10.190 5104 | CmdAvastRepairWrapper done (result: 0x800705b4)
22.10.2014 10:13:12.709 9904 | Installing VirtualBox...
22.10.2014 10:13:18.793 9904 | Creating snapshot...
22.10.2014 10:13:21.835 9920 | CmdAvastRepairWrapper done (result: 0x00000000)
22.10.2014 10:13:49.300 9904 | Volume shadow set: {a785f987-3b77-4e5c-bed5-be3988d35515}
22.10.2014 10:13:49.482 9904 | BCD volume: \\?\GLOBALROOT\Device\HarddiskVolumeShadowCopy21
22.10.2014 10:13:49.492 9904 | Windows volume: \\?\GLOBALROOT\Device\HarddiskVolumeShadowCopy22
22.10.2014 10:13:49.492 9904 | Creating new hive files...
22.10.2014 10:15:39.529 9904 | Cloning NTFS volumes...
22.10.2014 10:20:39.918 9904 | Creating a new VM machine...
22.10.2014 10:20:43.086 9904 | Starting VM machine to create initial snapshot, it can take a couple of minutes...