Some times when I power on my Dell isnpiron 6400. I heared that the voice of CPU fan became very high and loud, and the Windows load very slowly, I can't open any program just after 5 min from i double-clicked on its icon!! the system became very slow, and cpu usage is between 99-100%.
Just shut down and power on again.. every thing back normal and the Windows become fast.
I have Antivirus software (Kaspersky 6.0) and updating it every day..I wonder if it's virus why it will be not active when I shut down and operate the laptop again??
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