Thanx for the prompt reply,
I began with the suggestion by Eliya K.
once opening Synaptic pakage manager to update repositries I recieved a
message that change have been made ande require refreshing,
receiving the folowing error msg:
W: GPG error: http://ppa.launchpad.net
oneiric Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 80E7349A06ED541C
I was not able to access the reposotry tab.
:/ what next?