could be a program your running or something installed that disagrees with ntreev's clients, maybe the anti hack software they have.
i had a similar problem with an old ro server. didnt know what it was for ages, then i noticed it got worse when downloading torrents, so i uninstalled bitcomet and volla no more dc's
also zone alaram used to make my p2p programs like soulseek run extremely slow and cause a lot of dc's even tho i had it set to allow them access to the net , uninstalled, no more problems.
i guess just try and clean up your pc/laptop some.
run virus scans, discleanup/defrag , registry cleanup/defrag.
get rid of any old programs you dont use anymore.
and hope for the best.