I have Vista Ultimate x86 with CrackTCPIP.SYS installed. The network and torrents were working fine for several monts, until tonight. Well this is what hapens: When I start the torrent program after a while the whole network dies. No browsing at all, or any trafic at all. Windows shows that there is no problem with the network, when I run diagnostic. No 4226 error at event viewer. In the device manager and in proces explorer I can see that CrackTCPIP.SYS is loaded and working. When I try to trace route to random location, or even to my wireless router I cant pass Hop1, or said with other words I dont have acces even to my router. So logicaly I thougt there is problem with my router, he must be blocked. But how it is that windows shows that everithing is OK.. ??? Next I shut down my torrnet program, and after a while everything started working as it should. When the network came to life, first thing that I did is restarted my router and checked the settings..everithing was OK. Restarted my system and checked for viruses and rootkits on other system while my OS was both online and offline...no malware was detected. I think of my self that I have enought expirience in detecting malware...I'm cleening computers to all my friends and naibors from malware. Next I turned on my torrent program and gues what the problem happend again. Tried reinstaling network drivers and CrackTCPIP.SYS, but the problem persisted. I havent instaled anything for the last week or so, and was browsing sites that I browse on dayli basis...no new or unsafe sites. It is true that I have set the number of connections in my torrent program to insane number 99999, knowing that I have only 65535 ports available. Anyway I have been using uTorrent with this settings for monts and havent expiriencing any problems. But now I cant rise the connection number to greater value then 200 or so, without having a problem. I've been doing all this testing with Autoprotect, Firewall, Intrusion Prevention and Spyware protection off. Have anyone expirienced this kind of problem ??? Any help will be welcomed.