I have an AsRock N68-S UCC <?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p>mobo with a AMD Athlon II X2 245 CPU.
The disk activity LED (HDLED) flashes continuously every 2 or 3 seconds even when there is not such disk activity (for Process Explorer Monitor) in the system.
I have run an antivirus and do not see any infection.