get-spproduct and a blank server name

Team,

we are having issues in our SharePoint 2010 environment to run the configuration wizard, Wizard giving message that missing patchs but not giving server names.

when we run Get-SPproduct -Local it return 2 blank server names, can anybody provide solution these problem.

how can we remove these blank server names from config, what makes the blank server entries into configuration.

S.Venkata Appaji