Specifies the criteria with which the updates are searched on the server (Windows Update Site or WSUS).
If no criterion is specified, WuInstall searches by default for software (no drivers!), which has not yet been installed. So the default criteria is: IsInstalled=0 and Type='Driver'.
If an invalid criterion was specified, the search fails and WuInstall exits with code 4.
and includes only updates in the result list, which match these criteria.
WuInstall.exe /search /bypass_wsus /criteria "IsHidden=0 and IsInstalled=0 and IsAssigned=1"
Searches only for drivers, which have not yet been installed. Equivalent to the criteria (IsInstalled=0 and Type='Driver').
Searches for all types of updates, which have not yet been installed. Equivalent to criterion (IsInstalled=0).