You don't have to set 'Administration Rights' for SAMP Client.
I don't, and I haven't had 1 problem with it.
The errors, don't terminate the process, cause it lags your computer up.
(Cause you gotta right click the task bar, click 'Task-Manager' then find samp.exe and terminate it - All the while you getting 100's of happy error messages.)
Just hold Enter when you close SAMP.
They go away.
Not real sure about the 'Internet' servers not showing up.
The Master Server List was down for a while, now temporarily up only showing the 'Partyserver' and 'Littlewhiteys' servers.