Thanks for the suggestions. I have tried disabling the protection, no better I am afraid. I get windows error 0x81000037: Windows Backup failed while trying to read from the shadow copy on one of the volumes being backed up, I have tried deleting the reparse points as suggested but this makes difference but when I disable Avast its works as expected. I have used backup and restore with Avast for years with no problems but since the last Windows upgrade a couple of weeks ago they just now don't get on