I have a system with Windows XP and Vista dual booted on it. I have 4gb of ram, an Athlon 64 X2 processor, on it, to run Vista. I have also not done any overclocking on this machine. But the problem is that when ever the system stays at IDLE, then the hard drive light is continuously flashing and I can even hear it reading the hdd. I have partitioned this hard drive into half size and there are also plenty of space available. Can anyone let me know what should i do to fix this issue.