I'm not familiar with that app but if you can find it by searching in
Synaptic you will find "remove completely" in the right click menu.
Whether that will solve your slowdown I can't say but let's hope.

Yuuguu (which I downloaded from their site) is not found in Synaptic or
Add/Remove, neither does a search in 'Files'. I should say that I am
hoping that Fuuguu is not the problem as it seems at first glance to be
a useful application - nevertheless, I am experiencing silly problems -
such as, 'not found' with a log in to Google! A reload often cures this,
but not always.

Sometimes a shut down and reload will help, but only for a while.
According to http://www.bredbandskollen.se/ I am just now getting a send
rate of 0.21 mbit/sec and a receive of 1.78 mbit/sec - this compared to
a slowest speed before Christmas of 1.28 mbit/sec up and 3.46 mbit/sec
down. My connection is 3g mobile.

Their help desk is ...............unhelpful, they do Windose and a
little Mac, mention Linux and they go foggy.

I heard that some ocean cables got cut but I haven't heard that this is
a problem in practical usage.

I converted from being a Mac enthusiast since 84 last year because I
just could not keep up economically, and I chose Ubuntu and I am
sooooooo pleased, but I am an old bloke, and seriously, I have forgotten
even how to operate my video machine, it's still connected but it
doesn't do what it should because I don't speak it's language anymore I
guess (which is a shame because I have hundreds of tapes and I miss not
being able to record stuff when I get bed tired).

Anyway - now I have to light up a tray of 'Marchaller' (long life
candles) under my truck engine or it will not start tomorrow morning.

Thanks a lot for your suggestion Leslie Anne (being a Swede I find that
your name is lovely) and I really appreciate your positive attitude.

I am sure that this international Ubuntu gang will sort me out even
though my problem 'should' not have anything to do with our preferred OS.

Ok how did you install it ie what was the file extention and what is the
program for ?

I misspelled the thing - it's Yuuguu, a free screen and desktop
sharing tool:
www.yuuguu.com/
Downloading was just clicking on the Ubuntu 8.04 button (I am using 8.10
though) which loaded yuuguu_latest_i386.deb and then opening it in the
GDebi Package Manager and clicking OK to install.

Ok since it is a sharing application I suspect it needs to use part of your
internet speed to do this but the amount you seem to have slowed seems
excessive. If you go to a terminal and type top, this will show you the
running processes or alternatively and if you have it installed have a look
at your system monitor. If it is not showing up in the menu then I suspect
either you needed to install it via dpkg or it installs and starts working
and the way of controlling it isn't clear.
go to a terminal type dpkg -l | grep yuuguu, this will tell you if it has
installed and what bits have.