your problem is strange

i think its best to ask GM can answer your question faster... before you reinstall. atleast they can put your problem on their list.

i too have strange streamyx connection with too...
when i'm just surf the web, reading blog/wiki, the line is fine,
but when i'm have a heavy flow of traffic(playing wow) it auto disconnect(SO frustrate playing BG). at first i thought it was my 3 years old Aztech modem wants to retire... but now i started to think its streamyx trying to block heavy flow of traffic download like BT and stuff.