I am not quite sure what its the problem, my other guest the dont have the problem like I do they use Windows, and I use Linux.

I am losing network bandwidth and I am quite frankly I am not sure why, I don't have allot memory 495.6Mib But I clean my PC every few days "BleachBit"
Date.......CPU..........Network Receiving...........Sending
Oct/08.....12%.........313.5Mib....................... ..10.5Mib
Oct/12......47%.........0.0 Mib...........................0.0 Mib ..... ( I have Internet)

I have read some where on the magazine Network receiving suppose to be higher.
so how can I fix this issue please i am having allot problems, u use cable from Comcast

I am not quite sure what Information you might need from me to give.
Thank you very much
Note:
I use Ubuntu 8.04 LTS