thanks for the welcome.
but i read the first topic before i posted this. it says "if your upload is lower than 90% of the ISP ' s advertised speed, there might be a problem." i mostly take 10% of that speed. so there has to be another thing. and the second one is about viruses, i surely don't have any.
as i've mentioned before, this is not like an optimization thread, some specific thing has to be wrong. i want to know if somebody else had this kind of a problem.
wonder if there might be a problem in my modem, because in the upload process, the modem mostly doesn't talk with the host. but why a problem like decreasing the upload speed, while the download speed is just fine ??