Check Installed Updates from Command Line

Check which updates are installed via command line (or PSExec)

wmic qfe list brief /format:texttablewsys > "c:\temp\hotfix.txt"

or

wmic qfe list brief /format:htable > "c:\temp\hotfix.html"

Alternatively you can use the netdiag tool in verbose mode

netdiag -v

or more specifically

netdiag -v | findstr "KB########"

Where KB####### represents the KB article number you're looking for