Thank u all,
reason behind it is that windows will automaticly download upodates without telling you ... while u r connected, windows starts downloading patches too, thats y your net becomes slow, usually when updates r downloaded and installed, your pc does become up to date but overall performance becomes slow too.. as we can always get pirated windows and we have no valuable software to loose. its better for us to shut this feature off and run windows as they are.. now when u r connected, windows isent downloading stuff so u get full speed.
Regards