Thanks Tomasz for your fast and kind reply! IIS is the service "World Wide Web Publishing Service" and it's enabled by default in win2k server. When I install SP5, Rollup2 and Rollup 2 Extension for server, at reboot it starts fine. When I try to install UURollup, at reboot the service always fails with error 1008 (token doesn't exist). My installations are essentials: win2k (the order of updates is in my previous post), 7zip (sometimes) and VMware Tools I don't know if it can be helpful, but when I tried to downgrade advapi32.dll to the previous version, I received some errors in startup (for example Netlogon service is not started), but IIS is started fine.