I downloaded SP2 (isasp2-ENU.exe 3,991,168 bytes), unpacked it, ran update\update.exe, and got this error: The program cannot register fltrsnk1.dll file. And everything rolled back. This is a pretty vanilla install of ISA (single NIC/IP external, single NIC/IP internal), what should I look for to make this work? Also, since I can't apply SP2, this probably kills any chance of upgrading to 2004 on the same box, right? Thanks.