Thanks for the reply. I scan my PC regularly for spyware and virus with Ad-Aware and AVG. I don't think it is caused by a Trojan, because my modem lights are not flashing like when I download a big file for exemple. I did contact my ISP last week on this, but they wasn't of good help. I will maybe try to talk with another support person before thinking about switching ISP.

>Think it sounds like a config problem, i.e. you will cotact the ISP for guidance.
>The only other thing that can cause this is a trojan infection i.e. the trojan is using all the bandwidth. So do a full virus & spyware scan, also resize your pagefile, i.e. increase the size by 1meg then reduce it back to where it was, this recreates the pagefile and drops anything that is living in there, virus scanner don't look at the pagefile.