I too have had issues with the SNX client and how it cleans up after itself when you uninstall. There is a "cpclean" utility that works pretty well. You can download it at:
http://www.checkpoint.com/downloads/...s.html#cpclean I found that the important "files" to remove are the vna_coinstall.dll and the vna.sys. first found in "windows dir"\system32 and the latter found in the "windows dir"\system32\drivers
HTH
Randy