PC tip: this evening I made a full scansion of my beloved PC with Microsoft Security Essentials (3:30h), since I got an Explorer error. Result was that (notwithstanding all my protections), I got an "Exploit:Java/Urains.A" trojan, that was removed. May be this explains why my HD was was revving for minutes, even when I was not using it. Now, apparently it doesn't do that anymore and it's almost been one hour that I seldom hear the cooling ventilator... then bros, do a full scan from time to time. My last was last year...