Isass.exe - Unable to locate SAMSRV.DLL

Hi ! I have a problem with Win NT 4 Workstation.
I installed a microsoft patch for the code red worm. This was a wrong move as the patch was meant for server.

Now I am not able to boot into Windows. It gives me a error message "Isass.exe - Unable to locate dll" " The Dynamic Link Library SAMSRV.DLL could not be found in the specified path"

I also tried to copy the following files to a floppy in a: to boot to winnt but it says Non System Disk in Drive A:. The Files are:
boot.ini
NTDETECT.com
NTLDR

Any solutions how to get my win nt working ?