ughaibu:
I will say 4 item from Aragon advice its the problem with files classes... Those files are java ones that reside on temprary Internet Download folder. So Antivirus pick the guys when you access the dwnload files but when you look gfor it they don't exist anymore.
Not sure if you change the Browser this files (class java ones) stop to come to your computer... But you can give a try and share with us. ;-) But for play for safe just have sure you have a reliable AntiVirus Program updated often.
Hope i helped ughaibu...