I reported about a freezing problem after applying the SR1 patch. Now I replaced the TPkd.sys file 4.1.1.1074 version with the 3.0.7.840 in my main WinK2 partition and, oh wonder, Poser5 and AvatarLab are running again. TPkd.sys is an Interlok system file Anti-Piracy from PACE. Both Poser5 and Avatarlab use the same registration procedure and in my case it's evident that the freezing problem was caused by the protection mecanism.