In search of usable uTorrent version because of this problem i got down to version 3.1.3 which is not "exposing" the Windows cache eating ram "bug" and I could finally USE uTorrent for big torrents and for longer times. And when i went to the Disk Cache settings under Advanced i think i understood why. In the 3.1.3 version there are the good old "Disable Windows caching for disk writes/reads" check boxes. In the next version 3.2(which i tested and was too exposing the Windows cache bug) those 2 options are no longer available! So maybe that is the reason for the huge RAM usage when downloading big torrents with latest versions(the windows cache bug). I tested all latest and first BUILDS of all VERSIONS of uTorrent(going from latest to older versions) down to latest build of 3.1.3 which is the last version without this Windows caching bug. I thought that those options were removed because uTorrent was using them(checked) by default from that version up. But as my research shows it seems that in post 3.1.3 versions either those options are not used at all or they ARE used,but something is messed up and its not working correctly or there are other changes made to uTorrent that are exposing the Windows cache bug. In any case as many users have already reported(including me),latest versions of uTorrent are simply NOT usable(unless you want your modern powerful PC to feel like a 10 year old bucket of bolts and nuts) when downloading big torrents or when running uTorrent for longer periods of time,because of this Windows cache bug that is somehow not exposed in 3.1.3 version,but it is in later versions. I would prefer a less perfect caching mechanism(if that is what is actually exposing the Windows cache bug in later versions),but having a usable uTorrent.But that is only my opinion. The only drawback to using 3.1.3 for me is that this version does not yet have the ability to download Magnet Links metadata during the add torrent dialog(which ofc eliminates the possibility to select which files to be downloaded before starting the job). But that is a very small price to pay for having a usable uTorrent,and im gladly paying it.