hey guys , i have been watching for one month that a file named setup.exe appears in a folder (in a seperate logical drive) where i usually download all files from net. first i thought downloaded myself. when i try to run it nothing happens. so i deleted. two days later it again apeared. also it doesn't copy itself or didn't run any background process. i checked task manger. i scanned it with Free AVG7 Av. it showed nothing. wht to do ....?