that answer is simple get another virus scanner or try another one....and why not get the best....try nod32.....if it says your clean well thats just what u are so heres the download site ...try the 30day trail if it finds something norton didnt i would throw out norton.
http://www.nod32.com/download/trial.htm
once u download it follow these instructions to max your protection u going to love it.
1. Make sure no other antivirus software is installed period, once nod32 is install u wont need
another one..this is the best after u run it once u will see why.
2. Once nod32 is install open it thru icon or desktop tray icon near computer time at bottom of
screen. You get control center and make sure all four tools are active..to activate click
setup....these 4 are very important..AMON DMON IMON NOD32...
3. Update it as soon as u can..if cant connect to internet. You will have to run it in safe mode to
remove infections..
4. Restart computer and press f8 until u get a black screen with menu choices, select safe mode
5. Log in under administrator and run nod32..u will see the nod32 icon on desktop open it....
Now click setup tab and checkmark deep,,,,,,,and advanced heuristic click extensions on bottom
and select all files. Now click actions tab and select quartine and delete.
6. Now u are really to run nod32 click scanning targets and click clean
7. Once all infections are cleaned restart computer and let it run in normal mode...now update
nod32 if u didnt and go back to step 4-6.