Thanks for reply! and thank you, it did solve my problem
i downloaded and scanned it with MCshield. it did work!
as for the log file, there's one appeared after the scan but it closed on its own, i dnt know why. well i can't seem to see any LOGS text or folder inside Program Files > MCshield. for what i understand is that "all program" you mentined was the program files. i can't see any "all program".
and i didn't do the step 2, there's no response on the link you gave.
....But it did fixed the problem it detected something on the flash drive, now there's a no name folder that contains all my files. i deleted the .vir file, seeing it as some useless file.