Have you change the boot order?
If not try this link http://pcsupport.about.com/od/fixtheproblem/ss/bootorderchange.htm
and specific for USB read this one...

Still the same:

http://www.notebookcheck.net/Review-Acer-Aspire-5750G-Notebook.46094.0.html

not only duel but 8 cores (i7) also ;).

Run 'Htop' in terminal->left numbers (1-No. cores) right shows load. at the end you'll see mem and etc.

hope helped

I dont really understand your problem.

what hardware btw

try this http://www.backtrack-linux.org/forums/showthread.php?t=48904

YOU ARE THE MAN! IT'S WORKING!!!!

(spec: LG A310 i3 intel graphic 2000)