A few websites talk about finding the executable file(s) that is/are causing the problem, restarting your computer into Safe Mode and deleting the file(s).
Did you have anti-virus, spyware, etc. softwares installed in your computer? Also, it might be good to have a firewall software installed, to avoid outside attacks to your computer.
I hope there's a cure for your HD.
Sending good thoughts,
malu
