2 of 3 Removed unnessecary **strong text**

This is because that vulnerability is patched. You can practice on Windows Server 2000

Before exploiting first find information related to that vulneability

msf> info exploit/windows/smb/ms03_26

and you will get information related that

Also when you set your exploit then use this command :-> "check"

It will tell you is vulnerability exist in victim or not