The 3dmark11 score is slightly wrong shall I say. Your physics score should score at least 1000 higher. Check task manager background cpu usage and check anti virus software to see if it is scannning or check hdd usage.
I hardly think it's a malware, since i just formated the HD. Also all programs were closed when the tests ran.
for a start you are using 3 sticks of ram so you will be using single channel not dual channel for dual channel you need to remove 1 stick and that could be causing a bottle neck in your system
I removed one stick and ran 3dmark again, the results look a bit better but still suck:http://www.3dmark.com/3dm11/5016773