When you need to check what updates are installed on your Server Core machine, asimple way is to use the WMI commandline tool called WMIC and provide the built in alias QFE.
WMIC QFE
The output is wider than the command line window, so it is best to pipe the output to a text file
WMIC QFE >PATCHES.TXT
Then bring it up in notepad for review
NOTEPAD PATCHES.TXT

