There is a common irritating notifcation that is "Low Disk Space", to disable or remove this notification:
Go to : Start > Run > type regedit in registry editor Go to :
Right click the key's "folder" icon and select New Dword Value.
Name the new Dword value "NoLowDiskSpaceChecks" and give it a value of 1. Then close Registry and Reboot your system.