I am running windows 2003 data center on my server. I installed the following hot fixes 893086, 890923, 890859, 891781, 891711, 890175, 890047, 888113, 886903 When rebooted after this, the machine comes up with the message "Server Service will not start" . The system log has the following event entry : Event if 7023, The system cannot find the file specified. After trying to back the hot fixes out, I lose my networking. After much grief, I find tcpip.sys is missing in system32, I install it and I now have my networking again. Still can not get server service to go, find svr.sys is missing in system32. I install it and now server services will start. Got any ideas how I lost my srv.sys and tcpip.sys by installing the above hot fixes.