TimeCreated ProviderName Id Message
----------- ------------ -- -------
10/2/2015 12:09:26 PM Microsoft-Windows-Certific... 64 Certificate for local syst...
10/2/2015 4:09:25 AM Microsoft-Windows-Certific... 64 Certificate for local syst...
10/1/2015 8:09:24 PM Microsoft-Windows-Certific... 64 Certificate for local syst...
and then you want to display everything for just one of those events?
If you just want the message, use Select-Object.
If you only want event ID 64, include ID in your filterhashtable.
If you want to limit the number of events retrieved, use the -MaxEvents parameter of Get-WinEvent.