I can hear my C hard drive thrashing away when my system is idle, and even when my system is running programs.
Thought it might be Firefox that's using the hard drive a lot - checked it out, uses the hd a bit but no more than usual, but I can still hear the hard drive clicking away. So I close...
chrome
disk usage
driver issues
fileshield
firefox
hard drive
internet explorer
malware
performance issues
process explorer
raid driver
resource monitor
safe mode
svchost
sysinternals
system processes
task manager
thrashing
windows 7
windows media network
Antivirus and anti-spyware engine
avast! Intelligent Scanner
Silent/Gaming Mode
Behavior Shield
Real time anti-rootkit protection
Smart virus updates
avast! Community IQ
Behavioral Honeypots
Green computing
avast! iTrack
File System / Mail Shield
Web Shield
IM / P2P Shield
Network Shield...