Question : on wsus consol some computer list is in red icon what this mean

i have wsus 3 and in the list of the computer in the wsus consol i see some computer with (red x)what this mean and how i fix it?

Answer : on wsus consol some computer list is in red icon what this mean

I think if you hover the mouse over the red x a description should pop up.

Probably because this system hasn't contacted the WSUS server in 10 days or so...